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# The Lost Arithmetic Sequences CodeChef Solution

## The Lost Arithmetic Sequences CodeChef Solution in C++17

``````#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;

typedef pair<int, int> pi;
typedef pair<ll,ll> pl;
typedef pair<ld,ld> pd;

typedef vector<int> vi;
typedef vector<ll> vll;

#define all(v)       v.begin(),v.end()
#define sz(x)        (int)(x).size()
#define alr(v)       v.rbegin(),v.rend()
#define pb           push_back
#define S            second
#define F            first
#define pow2(x)      (1<<(x))
#define sp(x)        cout<<fixed<<setprecision(6)<<x
#define output(x)    cout<<(x?"YES\n":"NO\n")
#define bp(x)        __builtin_popcount(x)
//#define int long long
template<class T> using ordered_set = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;
// order_of_key (k) : Number of items strictly smaller than k .
// find_by_order(k) : K-th element in a set (counting from zero).

void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif

const int inf=2e9;
const int N=2e3+1;
const char nl='\n';
const ll mod=1e9+7;
const ll Binf=1e18;
const ll mod1=998244353;

void solve101(){
int n;cin>>n;
vector<int> v(n);
map<int,int> mp;
for(int i=0;i<n;i++){
cin>>v[i];
if(i!=0)
mp[v[i]-v[i-1]]++;
}
debug(mp);
if(n<=3 || sz(mp)==1){
cout<<*min_element(all(v))<<nl;
return;
}
vector<int> ans;
for(int i=0;i<n;i++){
if(i==0){
if(mp[v[2]-v[1]]==n-2)
ans.pb(v[0]);
}
else if(i==n-1){
if(mp[v[n-2]-v[n-3]]==n-2)
ans.pb(v[n-1]);
}
else{
debug(i,v[i+1]-v[i-1]);
int a=v[i]-v[i-1],b=v[i+1]-v[i];
// mp[a]--;mp[b]--;
if(mp[v[i+1]-v[i-1]]+1==n-2){
ans.pb(v[i]);
}
// mp[a]++,mp[b]++;
}
}
if(sz(ans)==0){
ans.pb(-1);
}
cout<<*min_element(all(ans))<<nl;

}
signed main() {

ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);

int t=1;
// debug(pr);
cin>>t;
for(int i=1;i<=t;i++){
// cout<<"Case #"<<i<<": ";
solve101();
}
cerr << "Time : " << 1000 * ((double)clock()) / (double)CLOCKS_PER_SEC << "ms\n";
return 0;
}
// always check for binary search >.<

// #ifndef ONLINE_JUDGE
//     if (fopen("input.txt", "r"))
//     {
//         freopen("input.txt", "r", stdin);
//         freopen("output.txt", "w", stdout);
//     }
// #endif``````

## The Lost Arithmetic Sequences CodeChef Solution in C++14

``````#include <bits/stdc++.h>
using namespace std;
#define int               long long
#define pb                push_back
#define ppb               pop_back
#define pf                push_front
#define ppf               pop_front
#define all(x)            (x).begin(),(x).end()
#define uniq(v)           (v).erase(unique(all(v)),(v).end())
#define sz(x)             (int)((x).size())
#define fr                first
#define sc                second
#define pii               pair<int,int>
#define rep(i,a,b)        for(int i=a;i<b;i++)
#define mem1(a)           memset(a,-1,sizeof(a))
#define mem0(a)           memset(a,0,sizeof(a))
#define ppc               __builtin_popcount
#define ppcll             __builtin_popcountll
#define debug(x)  cout<<(x)<<'\n';

template<typename T1,typename T2>istream& operator>>(istream& in,pair<T1,T2> &a){in>>a.fr>>a.sc;return in;}
template<typename T1,typename T2>ostream& operator<<(ostream& out,pair<T1,T2> a){out<<a.fr<<" "<<a.sc;return out;}
template<typename T,typename T1>T amax(T &a,T1 b){if(b>a)a=b;return a;}
template<typename T,typename T1>T amin(T &a,T1 b){if(b<a)a=b;return a;}

const long long INF=1e18;
const int32_t M=1e9+7;
const int32_t MM=998244353;

const int N=0;

void solve(){

int n;
cin>>n;
int a[n];
rep(i,0,n)
cin>>a[i];

if(n==2)
{
cout<<min(a[0],a[1])<<'\n';
return;
}

map<int,int> m;
for(int i=1;i<n;i++)
{
m[a[i]-a[i-1]]++;

}
int ans=INF;
for(int i=0;i<n;i++)
{

if(i==0)
{

if(a[1]-a[0]!=a[2]-a[1])
{
if(m[a[2]-a[1]]==n-2)
ans=min(ans,a[0]);
}
else
{

if(m[a[2]-a[1]]==n-1)
{
ans=min(ans,a[0]);
}

}

}
else if(i<n-1)
{
int p=a[i]-a[i-1];
int q=a[i+1]-a[i];
int r=a[i+1]-a[i-1];

{
ans=min(ans,a[i]);
}

}
else
{

if(m[a[1]-a[0]]==n-2 && a[i]-a[i-1]!=a[1]-a[0])
{
ans=min(ans,a[i]);
}
else if(m[a[1]-a[0]]-1==n-2 && a[i]-a[i-1]==a[1]-a[0])
{
ans=min(ans,a[i]);
}

}

}
if(ans==INF) ans=-1;

cout<<ans<<'\n';

}
signed main(){
ios_base::sync_with_stdio(false);
cin.tie(0);cout.tie(0);
//freopen("input.txt", "r", stdin);
//freopen("output.txt", "w", stdout);
#ifdef SIEVE
sieve();
#endif
#ifdef NCR
init();
#endif
int t=1;
cin>>t;
while(t--) solve();
return 0;
}``````

## The Lost Arithmetic Sequences CodeChef Solution in PYTH 3

``````# cook your dish here
for _ in range(int(input())):
n=int(input())
a=[int(i) for i in input().split()]
f=[0]*n
g=[0]*n
if n<=3:
print(min(a))
else:
f[0]=f[1]=f[2]=1
for i in range(2,n):
f[i]=(a[i]-a[i-1]==a[i-1]-a[i-2] and f[i-1])

g[n-1]=g[n-2]=1
for i in range(n-3,-1,-1):
g[i]=(a[i+1]-a[i]==a[i+2]-a[i+1] and g[i+1])

res=10**10
if g[1]:
res=min(res,a[0])
if g[2]:
if a[2]-a[0]==a[3]-a[2]:
res=min(res,a[1])
if f[n-2]:
res=min(res,a[n-1])
if f[n-3]:
if a[n-3]-a[n-1]==a[n-4]-a[n-3]:
res=min(res,a[n-2])

for i in range(2,n-2,1):
if f[i-1] and g[i+1] and a[i+1]-a[i-1]==a[i+2]-a[i+1]==a[i-1]-a[i-2]:
res=min(res,a[i])
if res==10**10:
print(-1)
else:
print(res)
``````

## The Lost Arithmetic Sequences CodeChef Solution in C

``````#include<stdio.h>
int main()
{
int t;
scanf("%d",&t);

while(t--)
{
int n,i;
scanf("%d",&n);
int a[n];

for(i=0;i<n;i++)
scanf("%d",&a[i]);

if(n==2)
{

if(a[0]>a[1])
a[0]=a[1];
printf("%d\n",a[0]);
continue;
}

int c=0;
int s=-1;
int min=-1;
int d=a[1]-a[0];

for(i=2;i<n;i++)
{
if(a[i]!=(a[0]+(i-c)*d))
{
c++;
min=a[i];

}
if(c==2)
{
min=-1;
break;
}
}

if(c==0&&d<0)
{
s=a[n-1];
printf("%d\n",s);
continue;
}

if(c==0)
{
s=a[0];
printf("%d\n",s);
continue;
}

if(c==1)
{
s=min;
}

c=1;
min=a[1];
d=a[2]-a[0];

for(i=3;i<n;i++)
{
if(a[i]!=(a[i-1]+d))
{
c++;
break;
}
}
if(c==1)
{
if(s==-1)
s=min;
else
if(min<s)
s=min;
}

c=1;
min=a[0];
d=a[2]-a[1];

for(i=3;i<n;i++)
{
if(a[i]!=(a[i-1]+d))
{
c++;
break;
}
}

if(c==1)
{
if(s==-1)
s=min;
else
if(min<s)
s=min;
}

printf("%d\n",s);
}
return 0;
}
``````

## The Lost Arithmetic Sequences CodeChef Solution in JAVA

``````/* package codechef; // don't place package name! */
import java.util.*;

import java.lang.*;
//import java.math.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class CodeChef
{

StringTokenizer s;
}
String next() {
while(s==null ||!s.hasMoreElements()) {
try {
}
catch(IOException e) {
e.printStackTrace();
}
}
return s.nextToken();
}
public int nextInt() {
return Integer.parseInt(next());
}
public long nextLong() {
return Long.parseLong(next());
}
public double nextDouble() {
return Double.parseDouble(next());
}
String nextLine() {
String str="";
try {
}
catch(IOException e) {
e.printStackTrace();
}
return str;
}
boolean hasNext() {
if (s != null && s.hasMoreTokens()) {
return true;
}
String tmp;
try {
b.mark(1000);
if (tmp == null) {
return false;
}
b.reset();
} catch (IOException e) {
return false;
}
return true;
}

}
public static int md=(int)(1e9+7);
public static HashMap<Long,HashMap<Integer,Long>> hm;
public static  ArrayList<trip> ans;
public static boolean fg;
public static int dp[][];
public static int anss;
static final int MAXN = 1000001;
public static void main (String[] args) throws java.lang.Exception
{
BufferedWriter log = new BufferedWriter(new OutputStreamWriter(System.out));
if(sc.hasNext()){
int t=sc.nextInt();
while(t--!=0) {
int n=sc.nextInt();
int a[]=new int[n];
HashMap<Integer,Integer> hm=new HashMap<>();
for(int i=0;i<n;i++)a[i]=sc.nextInt();
if(n<=3) {
int mn=Integer.MAX_VALUE;
for(int i=0;i<n;i++)mn=Math.min(mn, a[i]);
log.write(mn+"\n");
}
else {
int maj=-1,mx=-1;
for(int i=1;i<n;i++) {
int diff=a[i]-a[i-1];
hm.put(diff, hm.getOrDefault(diff, 0)+1);
if(mx<hm.get(diff)) {
mx=hm.get(diff);
maj=diff;
}
}
if(mx==n-1) {
if(maj>=0)log.write(a[0]+"\n");
else log.write(a[n-1]+"\n");
}
else {
int cnt[]=new int[n];
for(int i=1;i<n;i++) {
int diff=a[i]-a[i-1];
if(diff!=maj) {
cnt[i]++;
cnt[i-1]++;
}
}
boolean fg=true;
int ind=-1;
for(int i=0;i<n;i++) {
if(cnt[i]==2) {
ind=i;
break;
}
}
if(ind==-1) {
if(cnt[0]>=1)ind=0;
else ind=n-1;
}
int cd=Integer.MIN_VALUE;
for(int i=1;i<n;i++) {
int diff=a[i]-a[i-1];
if(i-1==ind) {
if(i-2>=0)diff=a[i]-a[i-2];
else continue;
}
else if(i==ind)continue;
if(cd==Integer.MIN_VALUE) {
cd=diff;
}
else if(cd!=diff) {
fg=false;
break;
}
}
if(fg)log.write(a[ind]+"\n");
else log.write("-1\n");
}
}

}

}
log.flush();

}
static String substring(String s,int i,int j) {
char tp[]=new char[j-i];
int ptr=0;
for(int k=i;k<j;k++) {
tp[ptr++]=s.charAt(k);
}
return String.valueOf(tp);
}
static boolean manacher_odd(String q) {
int n = q.length();
q = "\$" + q + "^";
char s[]=q.toCharArray();
int p[]=new int[n+2];
int l = 1, r = 1;
for(int i = 1; i <= n; i++) {
p[i] = Math.max(0, Math.min(r - i, p[l + (r - i)]));
while(s[i - p[i]] == s[i + p[i]]) {

if(i-p[i]!=i+p[i])return false;
p[i]++;
}
if(i + p[i] > r) {
l = i - p[i];
r = i + p[i];
}
}
return true;
}

static void update(int f[],int upd,int ind) {
int vl=ind;
while(vl<f.length) {
f[vl]^=upd;
int tp=~vl;
tp++;
tp&=vl;
vl+=tp;
}
}
static int ser(int f[],int ind) {
int vl=ind;
int sm=0;
while(vl!=0) {
sm^=f[vl];
int tp=~vl;
tp++;
tp&=vl;
vl-=tp;
}
return sm;
}
public static class pair{
int a,b;
public pair(int a,int b) {
this.a=a;
this.b=b;
}
}
public static class trip{
int a,b;
int c;
public trip(int a,int b,int c) {
this.a=a;
this.b=b;
this.c=c;
}
public int compareTo(trip q) {
return  this.b-q.b;
}
}

public static int mm=1000000007;
static long mul(long a,long b) {
return ((a%md)*(b%md))%md;
}
static long add(long a,long b) {
return ((a%md)+(b%md))%md;
}

static int fact(int n) {
for(int i=2;i*i<=n;i++) {
if(n%i==0)return i;
}
return 1;
}
public static <E> void p(E[][] a,String s) {
System.out.println(s);
for(int i=0;i<a.length;i++) {
for(int j=0;j<a[0].length;j++) {
System.out.print(a[i][j]+" ");
}

System.out.println();
}

}

//	public static <E> void p(E a,String s){
//		System.out.println(s+"="+a);
//	}
public static <E> void p(char a[],String s) {
System.out.print(s+"=");
for(int i=0;i<a.length;i++)System.out.print(a[i]+" ");
System.out.println();
}
public static <E> void p(ArrayList<E> a,String s){
System.out.println(s+"="+a);
}
public static <E> void p(LinkedList<E> a,String s){
System.out.println(s+"="+a);
}
public static <E> void p(Stack<E> a,String s){
System.out.println(s+"="+a);
}
public static <E> void p(Queue<E> a,String s){
System.out.println(s+"="+a);
}

public static class pairr{
String a;int b;
public pairr(String a,int b) {
this.a=a;
this.b=b;
}
}
public static class num{
long v;
}
static long gcd(long a,long b,num x,num y) {
if(b==0) {
x.v=1;
y.v=0;
return a;
}
num x1=new num();
num y1=new num();
long ans=gcd(b,a%b,x1,y1);
x.v=y1.v;
y.v=x1.v-(a/b)*y1.v;
return ans;
}
static long inverse(long b,long m) {
num x=new num();
num y=new num();
long gc=gcd(b,mm,x,y);
if(gc!=1) {
return -1;
}
return (x.v%mm+mm)%mm;

}
static long div(long a,long b,long m) {
a%=mm;
if(inverse(b,mm)==-1)return a/b;
return (inverse(b,m)*a)%mm;
}

static long ncr(int n, int r){
if(r>n-r)r=n-r;
long ans=1;
for(int i=0;i<r;i++){
ans=(ans%mm*(n-i)%mm)%mm;
ans=div(ans,(i+1),mm);
}
return ans;
}
static long pow(long a, long pw) {
long temp;
if(pw==0)return 1;
temp=pow(a,pw/2);
if(pw%2==0)return mul(temp,temp);
return mul(a,mul(temp,temp));

}
static int pow(int a, int pw) {
int temp;
if(pw==0)return 1;
temp=pow(a,pw/2);
if(pw%2==0)return temp*temp;
return a*temp*temp;

}
public static int m=(int)(1e9+7);
public static int add(int a,int b) {
return ((a%m)+(b%m))%m;
}
public static int mul(int a,int b) {
long p=a;
long q=b;
long ans=((p%m)*(q%m))%m;
return (int)(ans);
}
static ArrayList<Long> primeDivisor(long n){
ArrayList<Long> ar=new ArrayList<>();
int cnt=0;
boolean pr=false;
while(n%2==0) {
pr=true;
n/=2;

}
for(long i=3;i*i<=n;i+=2) {
pr=false;
while(n%i==0) {
n/=i;
pr=true;
}

}
return ar;

}
static ArrayList<Integer> prime(int n){
boolean vis[]=new boolean[n+1];
Arrays.fill(vis, true);
vis[0]=vis[1]=false;
for(int i=2;i*i<=n;i++) {
if(vis[i]) {
for(int j=2*i;j<=n;j+=i) {
vis[j]=false;
}
}
}
ArrayList<Integer> ar=new ArrayList<>();
for(int i=0;i<=n;i++) {
}
return ar;
}
static int gcd(int a,int b) {
if(b==0)return a;
return gcd(b,a%b);
}
static void mergesort(int[] a,int start,int end) {
if(start>=end)return;
int mid=start+(end-start)/2;
mergesort(a,start,mid);
mergesort(a,mid+1,end);
merge(a,start,mid,end);
}
static void merge(int []a, int start,int mid,int end) {
int ptr1=start;
int ptr2=mid+1;
int b[]=new int[end-start+1];
int i=0;
while(ptr1<=mid && ptr2<=end) {
if(a[ptr1]<=a[ptr2]) {
b[i]=a[ptr1];
ptr1++;
i++;
}
else {
b[i]=a[ptr2];
ptr2++;
i++;
}
}
while(ptr1<=mid) {
b[i]=a[ptr1];
ptr1++;
i++;
}
while(ptr2<=end) {
b[i]=a[ptr2];
ptr2++;
i++;
}
for(int j=start;j<=end;j++) {
a[j]=b[j-start];
}
}

}

``````

## The Lost Arithmetic Sequences CodeChef Solution in PYPY 3

``````for _ in range(int(input())):
n=int(input())
a=list(map(int,input().split()))
if n==2:
print(min(a))
elif n>=3:
l=[]
d1,d2,d3=a[2]-a[0],a[2]-a[1],a[1]-a[0]
for i in [d1,d3]:
x,y,count=a[0],1,0
while y<n:
if a[y]-x!=i:
count+=1
res=a[y]
else:
x=a[y]
y+=1
if count>=2:
break
if count==1:
l.append(res)
elif count==0:
l.append(min(a[0],a[-1]))
x,y,count=a[1],2,0
while y<n:
if a[y]-x!=d2:
count+=1
break
x=a[y]
y+=1
if count==0:
l.append(a[0])
if len(l)==0:
print(-1)
else:
print(min(l))``````

## The Lost Arithmetic Sequences CodeChef Solution in PYTH

``````t = int(input())
def isap(s,d,count,l,e):
if e == l[0] and count == 1:
s = s+1
count  = 0
for i in range(s,len(l)):
if l[i] != l[s] + d*(i-s-count):

count = count + 1

e = l[i]
if count == 1:

return -1

return e

else:
for i in range(s,len(l)):
if l[i] != l[s] + d*(i-s-count):

count = count + 1

e = l[i]
if count > 1:

return -1

if count == 1:
return e
elif count == 0:
if d>0:
return l[0]
else:
return l[len(l)-1]

for i in range(0,t):
t1 =  int(input())
l = map(int,raw_input().split())
if len(l) == 2:
print l[0]
elif len(l) == 3:
m = min(l)
print m
elif len(l) >=4:
x1 = l[1] - l[0]
x2 = l[2] - l[1]
x3 = l[3] - l[2]
y1 = l[2] - l[0]
y2 = l[3] - l[1]
if x1 == x2 == x3:

r = isap(0,x1,0,l,0)
print r
elif x1 == y2 and x2 == x3:

r1 = isap(0,x1,0,l,0)
r2 = isap(0,x2,1,l,l[0])
if r1 != -1 and r2 != -1:
if r1>r2:
print r2
else:
print r1

elif r1!= -1:
print r1
elif r2!= -1:
print r2
else:
print -1

elif y1 == x3 and x1 == x2:

r1 = isap(0,y1,0,l,0)
r2 = isap(0,x1,0,l,0)
if r1 != -1 and r2 != -1:
if r1>r2:
print r2
else:
print r1
elif r1!= -1:
print r1
elif r2!= -1:
print r2
else:
print -1
elif x1 == y2:

r = isap(0,x1,0,l,0)
print r

elif y1 == x3:

r = isap(0,y1,0,l,0)
print r
elif x1 == x2:

r = isap(0,x1,0,l,0)
print r
elif x2 == x3:

r = isap(0,x2,1,l,l[0])
print r
else:
print -1

``````

## The Lost Arithmetic Sequences CodeChef Solution in C#

``````using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;

// (づ°ω°)づﾐe★゜・。。・゜゜・。。・゜☆゜・。。・゜゜・。。・゜
public class Solver
{
public void Solve()
{
for (int tt = ReadInt(); tt > 0; tt--)
{

if (n < 4)
{
Write(a.Min());
continue;
}

int rd = a[n - 1] - a[n - 2];
int ld = a[1] - a[0];
int r = n - 2;
while (r > 0 && a[r] - a[r - 1] == rd)
r--;
int l = 1;
while (l < n - 1 && a[l + 1] - a[l] == ld)
l++;

int ans = int.MaxValue;
if (r < 2)
ans = Math.Min(ans, a[0]);
if (l > n - 3)
ans = Math.Min(ans, a[n - 1]);
if (a[2] - a[0] == rd && r < 3)
ans = Math.Min(ans, a[1]);
if (a[n - 1] - a[n - 3] == ld && l > n - 4)
ans = Math.Min(ans, a[n - 2]);
for (int i = 2; i < n - 2; i++)
if (ld == rd && a[i + 1] - a[i - 1] == ld)
ans = Math.Min(ans, a[i]);
Write(ans < int.MaxValue ? ans : -1);
}
}

#region Main

protected static TextWriter writer;
static void Main()
{
#if DEBUG
writer = Console.Out;
//writer = new StreamWriter("..\\..\\output.txt");
#else
writer = new StreamWriter(Console.OpenStandardOutput());
//writer = new StreamWriter("output.txt");
#endif
try
{
new Solver().Solve();
}
catch (Exception ex)
{
#if DEBUG
Console.WriteLine(ex);
#else
throw;
#endif
}
writer.Close();
}

#endregion

private static Queue<string> currentLineTokens = new Queue<string>();
public static string ReadToken() { while (currentLineTokens.Count == 0)currentLineTokens = new Queue<string>(ReadAndSplitLine()); return currentLineTokens.Dequeue(); }
public static int[][] ReadIntMatrix(int numberOfRows) { int[][] matrix = new int[numberOfRows][]; for (int i = 0; i < numberOfRows; i++)matrix[i] = ReadIntArray(); return matrix; }
{
int[][] matrix = ReadIntMatrix(numberOfRows); int[][] ret = new int[matrix[0].Length][];
for (int i = 0; i < ret.Length; i++) { ret[i] = new int[numberOfRows]; for (int j = 0; j < numberOfRows; j++)ret[i][j] = matrix[j][i]; } return ret;
}
public static string[] ReadLines(int quantity) { string[] lines = new string[quantity]; for (int i = 0; i < quantity; i++)lines[i] = reader.ReadLine().Trim(); return lines; }
public static void WriteArray<T>(IEnumerable<T> array) { writer.WriteLine(string.Join(" ", array)); }
public static void Write(params object[] array) { WriteArray(array); }
public static void WriteLines<T>(IEnumerable<T> array) { foreach (var a in array)writer.WriteLine(a); }
private class SDictionary<TKey, TValue> : Dictionary<TKey, TValue>
{
public new TValue this[TKey key]
{
get { return ContainsKey(key) ? base[key] : default(TValue); }
set { base[key] = value; }
}
}
private static T[] Init<T>(int size) where T : new() { var ret = new T[size]; for (int i = 0; i < size; i++)ret[i] = new T(); return ret; }
#endregion
}``````
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