Divide the Tangerine CodeChef Solution

Problem -Divide the Tangerine CodeChef Solution

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Divide the Tangerine CodeChef Solution in C++14

#include <bits/stdc++.h>

#pragma optimization_level 3
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx")
#pragma GCC optimize("Ofast")//Comment optimisations for interactive problems (use endl)
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimization ("unroll-loops")

using namespace std;

struct PairHash {inline std::size_t operator()(const std::pair<int, int> &v) const { return v.first * 31 + v.second; }};

// speed
#define Code ios_base::sync_with_stdio(false);
#define By ios::sync_with_stdio(0);
#define Sumfi cout.tie(NULL);

// alias
using ll = long long;
using ld = long double;
using ull = unsigned long long;

// constants
const ld PI = 3.14159265358979323846;  /* pi */
const ll INF = 1e18;
const ld EPS = 1e-9;
const ll MAX_N = 202020;
const ll mod = 1e9 + 7;

// typedef
typedef pair<ll, ll> pll;
typedef vector<pll> vpll;
typedef array<ll,3> all3;
typedef array<ll,5> all5;
typedef vector<all3> vall3;
typedef vector<all5> vall5;
typedef vector<ld> vld;
typedef vector<ll> vll;
typedef vector<vll> vvll;
typedef vector<int> vi;
typedef deque<ll> dqll;
typedef deque<pll> dqpll;
typedef pair<string, string> pss;
typedef vector<pss> vpss;
typedef vector<string> vs;
typedef vector<vs> vvs;
typedef unordered_set<ll> usll;
typedef unordered_set<pll, PairHash> uspll;
typedef unordered_map<ll, ll> umll;
typedef unordered_map<pll, ll, PairHash> umpll;

// macros
#define rep(i,m,n) for(ll i=m;i<n;i++)
#define rrep(i,m,n) for(ll i=n;i>=m;i--)
#define all(a) begin(a), end(a)
#define rall(a) rbegin(a), rend(a)
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
#define INF(a) memset(a,0x3f3f3f3f3f3f3f3fLL,sizeof(a))
#define ASCEND(a) iota(all(a),0)
#define sz(x) ll((x).size())
#define BIT(a,i) (a & (1ll<<i))
#define BITSHIFT(a,i,n) (((a<<i) & ((1ll<<n) - 1)) | (a>>(n-i)))
#define pyes cout<<"Yes\n";
#define pno cout<<"No\n";
#define endl "\n"
#define pneg1 cout<<"-1\n";
#define ppossible cout<<"Possible\n";
#define pimpossible cout<<"Impossible\n";
#define TC(x) cout<<"Case #"<<x<<": ";
#define X first
#define Y second

// utility functions
template <typename T>
void print(T &&t)  { cout << t << "\n"; }
template<typename T>
void printv(vector<T>v){ll n=v.size();rep(i,0,n){cout<<v[i];if(i+1!=n)cout<<' ';}cout<<endl;}
template<typename T>
void printvln(vector<T>v){ll n=v.size();rep(i,0,n)cout<<v[i]<<endl;}
void fileIO(string in = "input.txt", string out = "output.txt") {freopen(in.c_str(),"r",stdin); freopen(out.c_str(),"w",stdout);}
void readf() {freopen("", "rt", stdin);}
template<typename T>
void readv(vector<T>& v){rep(i,0,sz(v)) cin>>v[i];}
template<typename T, typename U>
void readp(pair<T,U>& A) {cin>>A.first>>A.second;}
template<typename T, typename U>
void readvp(vector<pair<T,U>>& A) {rep(i,0,sz(A)) readp(A[i]); }
void readvall3(vall3& A) {rep(i,0,sz(A)) cin>>A[i][0]>>A[i][1]>>A[i][2];}
void readvall5(vall5& A) {rep(i,0,sz(A)) cin>>A[i][0]>>A[i][1]>>A[i][2]>>A[i][3]>>A[i][4];}
void readvvll(vvll& A) {rep(i,0,sz(A)) readv(A[i]);}

struct Combination {
    vll fac, inv;
    ll n, MOD;

    ll modpow(ll n, ll x, ll MOD = mod) { if(!x) return 1; ll res = modpow(n,x>>1,MOD); res = (res * res) % MOD; if(x&1) res = (res * n) % MOD; return res; }

    Combination(ll _n, ll MOD = mod): n(_n + 1), MOD(MOD) {
        inv = fac = vll(n,1);
        rep(i,1,n) fac[i] = fac[i-1] * i % MOD;
        inv[n - 1] = modpow(fac[n - 1], MOD - 2, MOD);
        rrep(i,1,n - 2) inv[i] = inv[i + 1] * (i + 1) % MOD;
    }

    ll fact(ll n) {return fac[n];}
    ll nCr(ll n, ll r) {
        if(n < r or n < 0 or r < 0) return 0;
        return fac[n] * inv[r] % MOD * inv[n-r] % MOD;
    }
};

struct Matrix {
    ll r,c;
    vvll matrix;
    Matrix(ll r, ll c, ll v = 0): r(r), c(c), matrix(vvll(r,vll(c,v))) {}

    Matrix operator*(const Matrix& B) const {
        Matrix res(r, B.c);
        rep(i,0,r) rep(j,0,B.c) rep(k,0,B.r) {
                    res.matrix[i][j] = (res.matrix[i][j] + matrix[i][k] * B.matrix[k][j] % mod) % mod;
                }
        return res;
    }

    Matrix copy() {
        Matrix copy(r,c);
        copy.matrix = matrix;
        return copy;
    }

    Matrix pow(ll n) {
        assert(r == c);
        Matrix res(r,r);
        Matrix now = copy();
        rep(i,0,r) res.matrix[i][i] = 1;
        while(n) {
            if(n & 1) res = res * now;
            now = now * now;
            n /= 2;
        }
        return res;
    }
};

// geometry data structures
template <typename T>
struct Point {
    T y,x;
    Point(T y, T x) : y(y), x(x) {}
    Point(pair<T,T> p) : y(p.first), x(p.second) {}
    Point() {}
    void input() {cin>>y>>x;}
    friend ostream& operator<<(ostream& os, const Point<T>& p) { os<<p.y<<' '<<p.x<<'\n'; return os;}
    Point<T> operator+(Point<T>& p) {return Point<T>(y + p.y, x + p.x);}
    Point<T> operator-(Point<T>& p) {return Point<T>(y - p.y, x - p.x);}
    Point<T> operator*(ll n) {return Point<T>(y*n,x*n); }
    Point<T> operator/(ll n) {return Point<T>(y/n,x/n); }
    bool operator<(const Point &other) const {if (x == other.x) return y < other.y;return x < other.x;}
    Point<T> rotate(Point<T> center, ld angle) {
        ld si = sin(angle * PI / 180.), co = cos(angle * PI / 180.);
        ld y = this->y - center.y;
        ld x = this->x - center.x;

        return Point<T>(y * co - x * si + center.y, y * si + x * co + center.x);
    }
    ld distance(Point<T> other) {
        T dy = abs(this->y - other.y);
        T dx = abs(this->x - other.x);
        return sqrt(dy * dy + dx * dx);
    }

    T norm() { return x * x + y * y; }
};

template<typename T>
struct Line {
    Point<T> A, B;
    Line(Point<T> A, Point<T> B) : A(A), B(B) {}
    Line() {}

    void input() {
        A = Point<T>();
        B = Point<T>();
        A.input();
        B.input();
    }

    T ccw(Point<T> &a, Point<T> &b, Point<T> &c) {
        T res = a.x * b.y + b.x * c.y + c.x * a.y;
        res -= (a.x * c.y + b.x * a.y + c.x * b.y);
        return res;
    }

    bool isIntersect(Line<T> o) {
        T p1p2 = ccw(A,B,o.A) * ccw(A,B,o.B);
        T p3p4 = ccw(o.A,o.B,A) * ccw(o.A,o.B,B);
        if (p1p2 == 0 && p3p4 == 0) {
            pair<T,T> p1(A.y, A.x), p2(B.y,B.x), p3(o.A.y, o.A.x), p4(o.B.y, o.B.x);
            if (p1 > p2) swap(p2, p1);
            if (p3 > p4) swap(p3, p4);
            return p3 <= p2 && p1 <= p4;
        }
        return p1p2 <= 0 && p3p4 <= 0;
    }

    pair<bool,Point<ld>> intersection(Line<T> o) {
        if(!this->intersection(o)) return {false, {}};
        ld det = 1. * (o.B.y-o.A.y)*(B.x-A.x) - 1.*(o.B.x-o.A.x)*(B.y-A.y);
        ld t = ((o.B.x-o.A.x)*(A.y-o.A.y) - (o.B.y-o.A.y)*(A.x-o.A.x)) / det;
        return {true, {A.y + 1. * t * (B.y - A.y), B.x + 1. * t * (B.x - A.x)}};
    }

    //@formula for : y = ax + b
    //@return {a,b};
    pair<ld, ld> formula() {
        T y1 = A.y, y2 = B.y;
        T x1 = A.x, x2 = B.x;
        if(y1 == y2) return {1e9, 0};
        if(x1 == x2) return {0, 1e9};
        ld a = 1. * (y2 - y1) / (x2 - x1);
        ld b = -x1 * a + y1;
        return {a, b};
    }
};

template<typename T>
struct Circle {
    Point<T> center;
    T radius;
    Circle(T y, T x, T radius) : center(Point<T>(y,x)), radius(radius) {}
    Circle(Point<T> center, T radius) : center(center), radius(radius) {}
    Circle() {}

    void input() {
        center = Point<T>();
        center.input();
        cin>>radius;
    }

    bool circumference(Point<T> p) {
        return (center.x - p.x) * (center.x - p.x) + (center.y - p.y) * (center.y - p.y) == radius * radius;
    }

    bool intersect(Circle<T> c) {
        T d = (center.x - c.center.x) * (center.x - c.center.x) + (center.y - c.center.y) * (center.y - c.center.y);
        return (radius - c.radius) * (radius - c.radius) <= d and d <= (radius + c.radius) * (radius + c.radius);
    }

    bool include(Circle<T> c) {
        T d = (center.x - c.center.x) * (center.x - c.center.x) + (center.y - c.center.y) * (center.y - c.center.y);
        return d <= radius * radius;
    }
};

ll __gcd(ll x, ll y) { return !y ? x : __gcd(y, x % y); }
all3 __exgcd(ll x, ll y) { if(!y) return {x,1,0}; auto [g,x1,y1] = __exgcd(y, x % y); return {g, y1, x1 - (x/y) * y1}; }
ll __lcm(ll x, ll y) { return x / __gcd(x,y) * y; }
ll modpow(ll n, ll x, ll MOD = mod) { n%=MOD; if(!x) return 1; ll res = modpow(n,x>>1,MOD); res = (res * res) % MOD; if(x&1) res = (res * n) % MOD; return res; }

bool solve(vpll A, vpll B) {
    usll a, b;
    rep(i,0,sz(A)) a.insert(A[i].first - 1);
    rep(i,0,sz(B)) b.insert(B[i].first - 1);
    for(auto& now : b) if(!a.count(now)) return false;
    return true;
}
int main() {
    Code By Sumfi
    cout.precision(12);
    ll tc = 1;
    cin>>tc;
    rep(i,1,tc+1) {
        ll n,a,b;
        cin>>n>>a>>b;
        vpll A(a), B(b);
        readvp(A), readvp(B);
        if(solve(A,B)) pyes else pno
    }
    return 0;
}

Divide the Tangerine CodeChef Solution in PYTH 3

# cook your dish here

def solution(chefsdiv, kidsdiv):
	if len(kidsdiv) > len(chefsdiv): return False

	chefsdiv.sort()
	kidsdiv.sort()

	i, j = 0, 0
	while i <len(chefsdiv) and j <len(kidsdiv):
		if chefsdiv[i][0] == kidsdiv[j][0]:
			i += 1
			j += 1
		elif chefsdiv[i][0] < kidsdiv[j][0]:
			i += 1
		else: 
			return False
	return j == len(kidsdiv)
	


t = int(input())
while t:
	n, k, p = map(int, input().split())
	chefsdiv = []
	kidsdiv = []

	for _ in range(k):
		chefsdiv.append(list(map(int, input().split())))
	for _ in range(p):
		kidsdiv.append(list(map(int, input().split())))

	res = 'Yes' if solution(chefsdiv, kidsdiv) else 'No'
	print(res)
	t -= 1

Divide the Tangerine CodeChef Solution in C

#include<stdio.h>
int main() {
	
	int t,n,i,j,k,p,a[500],b[500];
	scanf("%d",&t);
	while(t--)
	{
		scanf("%d %d %d",&n,&k,&p);
		
		for(i=0;i<k;i++){
			scanf("%d",&j);
			a[i]=j;
		scanf("%d",&j);
		}
	    for(i=0;i<p;i++){
	    	scanf("%d",&j);
	    	b[i]=j;
			scanf("%d",&j);
	    }
	    for(i=0;i<p;i++){
	    	for(j=0;j<k;j++){
	    		if(b[i]==a[j]){
	    			break;
	    		}
	    	}
	    	if(j==k){
	    		printf("No\n");
	    		break;
	    	}
	    }
	    if(i==p)
	    printf("Yes\n");
	}
	return 0;
}

Divide the Tangerine CodeChef Solution in JAVA

/* package codechef; // don't place package name! */

import java.io.*;
import java.util.*;
class tang implements Comparable<tang>
{
    int st,end;
    public tang(int s,int e)
    {
        this.st=s;
        this.end=e;
    }
    public int compareTo(tang ob)
    {
        return Integer.compare(this.st,ob.st);
    }
    public static void main(String args[])throws IOException
    {
        Reader sc=new Reader();
        int t=sc.nextInt();
        for(int z=1;z<=t;z++)
        {
            int n=sc.nextInt();
            int k=sc.nextInt();
            int p=sc.nextInt();
            List<tang> list=new ArrayList<>();
            for(int i=0;i<k;i++)
            {
                list.add(new tang(sc.nextInt(),sc.nextInt()));
            }
            Collections.sort(list);
            HashSet<Integer> start=new HashSet<>();
            HashSet<Integer> end=new HashSet<>();
            for(int i=0;i<k;i++)
            {
                tang ob1=list.get(i);
                if(i==0)
                {
                    start.add(ob1.st);
                    end.add(ob1.end);
                }
                else
                {
                    tang ob2=list.get(i-1);
                    if(ob1.st-ob2.end == 1)
                    {
                        start.add(ob1.st);
                        end.add(ob1.end);
                    }
                    else if(ob1.st-ob2.end > 1)
                    {
                        start.add(ob2.end+1);
                        end.add(ob1.st-1);
                        start.add(ob1.st);end.add(ob1.end);
                    }
                    else
                    {
                        if((n-ob2.end+ob1.st) > 1)
                        {
                            if(ob2.end==n)
                                start.add(1);
                            else
                                start.add(ob2.end+1);
                            if(ob1.st==1)
                                end.add(n);
                            else
                                end.add(ob1.st-1);
                        }
                        else
                        {
                            start.add(ob1.st);
                            end.add(ob1.end);
                        }
                    }
                }
            }
            int f=0;
            for(int i=0;i<p;i++)
            {
                int a=sc.nextInt();
                int b=sc.nextInt();
                if(!start.contains(a))
                {
                    f=1;
                    //break;
                }
                if(!end.contains(b))
                {
                    f=1;
                    //break;
                }
            }
            
            if(f==0)
                System.out.println("Yes");
            else
                System.out.println("No");
        }
    }
}
class Reader {
		final private int BUFFER_SIZE = 1 << 16;
		private DataInputStream din;
		private byte [] buffer;
		private int bufferPointer, bytesRead;
		public Reader () {
			din = new DataInputStream (System.in);
			buffer = new byte[BUFFER_SIZE];
			bufferPointer = bytesRead = 0;
		}
		
		public Reader (String file_name) throws IOException {
			din = new DataInputStream (new FileInputStream (file_name));
			buffer = new byte[BUFFER_SIZE];
			bufferPointer = bytesRead = 0;
		}
		
		public String readLine () throws IOException {
			byte [] buf = new byte[1024];
			int cnt = 0, c;
			while ((c = read ()) != -1) {
				if (c == '\n')
					break;
				buf[cnt++] = (byte) c;
			}
			return new String (buf, 0, cnt);
		}
		
		public int nextInt () throws IOException {
			int ret = 0;
			byte c = read ();
			while (c <= ' ')
				c = read ();
			boolean neg = (c == '-');
			if (neg)
				c = read ();
			do {
				ret = ret * 10 + c - '0';
			} while ((c = read ()) >= '0' && c <= '9');
			if (neg)
				return -ret;
					return ret;
		}
		
		public long nextLong () throws IOException {
			long ret = 0;
			byte c = read ();
			while (c <= ' ')
				c = read ();
			boolean neg = (c == '-');
			if (neg)
				c = read ();
			do {
				ret = ret * 10 + c - '0';
			} while ((c = read ()) >= '0' && c <= '9');
			if (neg)
				return -ret;
			return ret;
		}
		
		public double nextDouble () throws IOException {
			double ret = 0, div = 1;
			byte c = read ();
			while (c <= ' ')
				c = read ();
			boolean neg = (c == '-');
			if (neg)
				c = read ();
			do {
				ret = ret * 10 + c - '0';
			} while ((c = read ()) >= '0' && c <= '9');
			if (c == '.')
				while ((c = read ()) >= '0' && c <= '9')
					ret += (c - '0') / (div *= 10);
			if (neg)
				return -ret;
			return ret;
		}
		private void fillBuffer () throws IOException {
			bytesRead = din.read (buffer, bufferPointer = 0, BUFFER_SIZE);
			if (bytesRead == -1)
				buffer[0] = -1;
		}
		
		private byte read () throws IOException {
			if (bufferPointer == bytesRead)
				fillBuffer ();
			return buffer[bufferPointer++];
		}
		
		public void close () throws IOException {
			if (din == null)
				return;
			din.close ();
		}
	}

Divide the Tangerine CodeChef Solution in PYTH

t=int(raw_input())
while t:
	flag=0
	t-=1
	n,k,p=map(int,raw_input().split())
	a=[]
	while k:
		k-=1
		x,y=raw_input().split()
		a.append(x)
	st=set(a)
	while p:
		p-=1
		x,y=raw_input().split()
		if x not in st :
			flag=1
	if flag==1:
		print 'No'
	else:
		print 'Yes' 

Divide the Tangerine CodeChef Solution in C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;


namespace tangdiv
{
    class Program
    {
        static int[] ptemp = new int[501];
        static int[] ftemp = new int[501];

        static void merge_sort(int[] a, int[] b, int l, int m, int r)
        {
            int i, j, k;
            int g;
            i = l;
            j = m + 1;
            k = l;

            while (i <= m && j <= r)
            {
                if (a[i] <= a[j])
                { ptemp[k] = a[i]; ftemp[k] = b[i]; k++; i++; }
                else
                { ptemp[k] = a[j]; ftemp[k] = b[j]; k++; j++; }
            }

            while (i <= m)
            { ptemp[k] = a[i]; ftemp[k] = b[i]; k++; i++; }

            while (j <= r)
            { ptemp[k] = a[j]; ftemp[k] = b[j]; k++; j++; }

            for (g = l; g <= r; g++)
            { a[g] = ptemp[g]; b[g] = ftemp[g]; }
        }

        static void merge(int[] a, int[] b, int l, int u)
        {
            int ub, lb, mid;
            lb = l;
            ub = u;
            mid = (lb + ub) / 2;
            if (lb < ub)
            {
                merge(a, b, lb, mid);
                merge(a, b, mid + 1, ub);
                merge_sort(a, b, lb, mid, ub);
            }
        }
        static void Main(string[] args)
        {
            int t, n, k, p;
            String[] str;
            bool flag;
            int[] c1 = new int[501];
            int[] b1 = new int[501];
            int[] c2 = new int[501];
            int[] b2 = new int[501];
          
            t = int.Parse(Console.ReadLine());
            while (t-- > 0)
            {
                str = Console.ReadLine().Split();
                n = int.Parse(str[0]);
                k = int.Parse(str[1]);
                p = int.Parse(str[2]);
               
                for (int i = 1; i <= k; i++)
                {
                    str = Console.ReadLine().Split();
                    c1[i] = int.Parse(str[0]);
                    c2[i] = int.Parse(str[1]);
                }

                for (int i = 1; i <= p; i++)
                {
                    str = Console.ReadLine().Split();
                    b1[i] = int.Parse(str[0]);
                    b2[i] = int.Parse(str[1]);
                }
                if (p > k)
                {
                    Console.WriteLine("No");
                    continue;
                }

                merge(c1, c2, 1, k);
                merge(b1, b2, 1, p);
                
                if (c1[k] > c2[k])
                {
                    if (b1[p] > b2[p])
                    {
                        b2[p] += n;
                        c2[k] += n;
                    }
                    else
                    {
                        Console.WriteLine("No");
                        continue;
                    }
                }
              
                int f = p;
                int x;
                for(x = 1; x <= k; x++){
                    if(c1[x] >= b1[1])
                        break;
                   if(c1[x] < b1[1]){
                       c1[x] += n;
                       c2[x] += n;
                   }
                }
                if(x > 1)
                merge(c1,c2,1,k);
                if (c1[k] > c2[k])
                {
                    if (b1[p] > b2[p])
                    {
                        b2[p] += n;
                        c2[k] += n;
                        
                        
                    }
                    else
                    {
                        Console.WriteLine("No");
                        continue;
                    }
                }
                
                flag = true;
              

                int j = 1; 
                for (int i = 1; i <= p; )
                {
                    if (c1[j] < b1[i] || b2[i] < c2[j])
                    {
                        flag = false;
                        break;
                    }
                    b1[i] = c2[j]+1;
                    
                    if (b1[i] > b2[i])
                        i++;
                    j++;
                    

                }
                
                

                if (flag)
                    Console.WriteLine("Yes");
                else
                    Console.WriteLine("No");
           }
        }
    }
}

Divide the Tangerine CodeChef Solution in GO

package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
)

func readInt(bytes []byte, from int, val *int) int {
	i := from
	tmp := 0
	for i < len(bytes) && bytes[i] != ' ' {
		tmp = tmp*10 + int(bytes[i]-'0')
		i++
	}
	*val = tmp
	return i
}

func readNum(scanner *bufio.Scanner) (a int) {
	scanner.Scan()
	readInt(scanner.Bytes(), 0, &a)
	return
}

func readTwoNums(scanner *bufio.Scanner) (a int, b int) {
	scanner.Scan()
	x := readInt(scanner.Bytes(), 0, &a)
	readInt(scanner.Bytes(), x+1, &b)
	return
}

func readThreeNums(scanner *bufio.Scanner) (a int, b int, c int) {
	scanner.Scan()
	x := readInt(scanner.Bytes(), 0, &a)
	x = readInt(scanner.Bytes(), x+1, &b)
	readInt(scanner.Bytes(), x+1, &c)
	return
}

func readNNums(scanner *bufio.Scanner, n int) []int {
	res := make([]int, n)
	x := -1
	scanner.Scan()
	for i := 0; i < n; i++ {
		x = readInt(scanner.Bytes(), x+1, &res[i])
	}
	return res
}

func main() {
	scanner := bufio.NewScanner(os.Stdin)

	t := readNum(scanner)

	for t > 0 {
		n, k, p := readThreeNums(scanner)
		A := make([][]int, k)
		for i := 0; i < k; i++ {
			A[i] = readNNums(scanner, 2)
		}

		P := make([][]int, p)
		for i := 0; i < p; i++ {
			P[i] = readNNums(scanner, 2)
		}

		res := solve(n, k, p, A, P)

		if res {
			fmt.Println("Yes")
		} else {
			fmt.Println("No")
		}

		t--
	}
}

func solve(n, k, p int, A [][]int, P [][]int) bool {
	if k < p {
		return false
	}
	xs := make(PRS, k)
	for i := 0; i < k; i++ {
		xs[i] = &PR{A[i][0], A[i][1]}
	}

	ys := make(PRS, p)
	for i := 0; i < p; i++ {
		ys[i] = &PR{P[i][0], P[i][1]}
	}

	sort.Sort(xs)
	sort.Sort(ys)

	var ii, jj int

	for ii < k && jj < p {
		if xs[ii].from == ys[jj].from {
			break
		}
		if xs[ii].from < ys[jj].from {
			ii++
		} else {
			jj++
		}
	}

	if ii == k || jj == p {
		// can not align
		return false
	}

	if ii > 0 {
		zs := make(PRS, k)
		copy(zs, xs[ii:])
		copy(zs[k-ii:], xs[:ii])
		xs = zs
	}
	if jj > 0 {
		zs := make(PRS, p)
		copy(zs, ys[jj:])
		copy(zs[p-jj:], ys[:jj])
		ys = zs
	}

	for i := 0; i < k; i++ {
		if i > 0 {
			if xs[i].from < xs[i-1].end {
				xs[i].from += n
			}
		}
		if xs[i].end < xs[i].from {
			xs[i].end += n
		}
	}

	for i := 0; i < p; i++ {
		if i > 0 {
			if ys[i].from < ys[i-1].end {
				ys[i].from += n
			}
		}
		if ys[i].end < ys[i].from {
			ys[i].end += n
		}
	}

	ii, jj = 0, 0
	for ii < k && jj < p {
		if xs[ii].end > ys[jj].end {
			return false
		}
		if xs[ii].end == ys[jj].end {
			jj++
		}
		ii++
	}
	return ii == k && jj == p
}

type PR struct {
	from, end int
}

type PRS []*PR

func (this PRS) Len() int {
	return len(this)
}

func (this PRS) Less(i, j int) bool {
	return this[i].from < this[j].from
}

func (this PRS) Swap(i, j int) {
	this[i], this[j] = this[j], this[i]
}

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