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Buggy algorithm CodeChef Solution
Problem -Buggy algorithm CodeChef Solution
“This website is dedicated for CodeChef solution where we will publish right solution of all your favourite CodeChef problems along with detailed explanatory of different competitive programming concepts and languages.
Buggy algorithm CodeChef Solution in C++17
“
#include <bits/stdc++.h>
using namespace std;
char getchar_() {
#ifdef LOCAL
return getchar();
#else
static char buf[1 << 20], *b = buf;
static int cnt = 0;
if (cnt == 0) {
if ((cnt = fread(buf, 1, 1 << 20, stdin)) == 0)
return EOF;
b = buf;
}
return cnt--, *b++;
#endif
}
void scan(char *cc) {
int i = 0;
char c;
while (isspace(c = getchar_()))
;
cc[i++] = c;
while (!isspace(c = getchar_()) && c != EOF)
cc[i++] = c;
}
template<class T> void scan(T *x) {
int sign = 1;
char c;
while (!isdigit(c = getchar_()))
if (c == '-')
sign = -1;
*x = c - '0';
while (isdigit(c = getchar_()))
*x = (*x << 1) + (*x << 3) + (c - '0');
*x *= sign;
}
template<class T, class... Ts> void scan(T t, Ts... ts) {
scan(t), scan(ts...);
}
#define N 30
int main() {
int t;
scan(&t);
while (t--) {
static long long dp[N][N];
static int aa[N], pp[N];
long long ans;
int n, m, i, j, k;
scan(&n, &m);
for (i = 0; i < m; i++) {
scan(&aa[i]), aa[i]--;
pp[i] = aa[i];
for (j = 0; j < i; j++)
if (aa[j] < aa[i])
pp[i]--;
}
memset(dp, 0, sizeof dp);
dp[0][0] = 1;
for (i = 1; i < n; i++)
for (j = 0; j < n; j++)
if (i < n - m) {
if (j == 0)
for (k = 0; k <= i; k++) {
if (k == 0)
dp[i][0] += dp[i - 1][j];
else
dp[i][k] += dp[i - 1][j];
}
else
for (k = 0; k <= j; k++) {
if (k == 0)
dp[i][j + 1] += dp[i - 1][j];
else
dp[i][k] += dp[i - 1][j];
}
} else {
k = pp[n - 1 - i];
if (j == 0) {
if (k == 0)
dp[i][0] += dp[i - 1][j];
else if (k <= i)
dp[i][k] += dp[i - 1][j];
} else {
if (k == 0)
dp[i][j+1] += dp[i - 1][j];
else if (k <= j)
dp[i][k] += dp[i - 1][j];
}
}
ans = 0;
for (i = 0; i < n; i++)
ans += dp[n - 1][i];
printf("%lld\n", ans);
}
return 0;
}Buggy algorithm CodeChef Solution in C++14
“#include <iostream>
#define ll long long
using namespace std;
int main() {
int t;
cin >> t;
for(int a = 0; a < t; a++){
int n,m;
cin >> n >> m;
int arr [m];
for(int i = 0; i < m; i++){
cin >> arr[i];
arr[i]--;
}
int pos [m];
for(int i = 0; i < m; i++){
pos[i] = arr[i];
for(int j = 0; j < i; j++){
if(arr[j] < arr[i]){
pos[i]--;
}
}
// cout << pos[i] << " ";
}
//cout << endl;
ll f [n][n];
for(int i = 0; i < n; i++){
for(int j = 0; j < n; j++){
f[i][j] = 0;
}
}
f[0][0] = 1;
for(int i = 1; i < n; i++){
for(int j = 0; j < n; j++){
if(i < (n-m)){
if(j == 0){
for(int k = 0; k <= i; k++){
if(k == 0){
f[i][0] += f[i-1][j];
}else{
f[i][k] += f[i-1][j];
}
}
}else{
for(int k = 0; k <= j; k++){
if(k == 0){
f[i][j+1] += f[i-1][j];
}else{
f[i][k] += f[i-1][j];
}
}
}
}else{
int k = pos[n-1-i];
if(j == 0){
if(k == 0){
f[i][0] += f[i-1][j];
}else if(k <= i){
f[i][k] += f[i-1][j];
}
}else{
if(k == 0){
f[i][j+1] += f[i-1][j];
}else if(k <= j){
f[i][k] += f[i-1][j];
}
}
}
}
}
/*for(int i = 0; i < n; i++){
for(int j = 0; j < n; j++){
cout << f[i][j] << " ";
}
cout << endl;
}
cout << endl;*/
ll sum = 0;
for(int i = 0; i < n; i++){
sum += f[n-1][i];
}
cout << sum << endl;
}
}Buggy algorithm CodeChef Solution in C
“#include <stdio.h>
#define MAX 40
#define DEBUG 0
#define max(a,b) ((a)>(b)?(a):(b))
int main()
{
long long a[MAX+1][MAX+1]={0};
long long ukupno;
int manji[MAX],brManji;
int veci[MAX],brVeci;
int i,j,k,l;
int n,t,m;
int tablica[MAX];
int moze;
scanf("%d",&t);
while(t--)
{
scanf("%d %d",&n,&m);
for(i=1;i<=n;i++)
tablica[i]=0;
brVeci=brManji=1;
veci[0]=manji[0]=0;
for(i=1;i<=m;i++)
{
scanf("%d",&k);
if (k>=i)
{
veci[brVeci++]=k;
tablica[k]=2;
}
else
{
manji[brManji++]=k;
tablica[k]=1;
}
}
for(i=1;i<brManji;i++)
if (manji[i]<manji[i-1])
goto kraj;
for(i=1;i<brVeci;i++)
if (veci[i]<veci[i-1])
goto kraj;
for(i=1;i<brManji;i++)
for(j=manji[i-1]+1;j<manji[i];j++)
if (tablica[j]!=2)
{
if (j<veci[brVeci-1])
goto kraj;
tablica[j]=3;
}
for(i=1;i<brVeci;i++)
for(j=veci[i-1]+1;j<veci[i];j++)
if (tablica[j]!=1)
{
if (j<manji[brManji-1])
goto kraj;
tablica[j]=4;
}
#if DEBUG
for(i=1;i<=n;i++)
printf("%d ",tablica[i]);
printf("\n");
#endif
for(i=1;i<=n;i++)
for(j=i+1;j<=n;j++)
a[i][j]=0;
moze=1;
for(i=1;i<=n;i++)
{
if (tablica[i]==1||tablica[i]==2||tablica[i]==3)
continue;
for(j=max(i+1,m+1);j<=n;j++)
{
ukupno=moze;
for(k=i-1;k>=1;k--)
{
if (tablica[k]==3||tablica[k]==2)
continue;
for(l=k+1;l<j;l++)
ukupno+=a[k][l];
if (tablica[k]==1||tablica[k]==4)
break;
}
a[i][j]=ukupno;
}
if (tablica[i]==4)
moze=0;
}
#if DEBUG
for(i=1;i<=n;i++)
{
for(j=1;j<=n;j++)
printf("%5lld",a[i][j]);
printf("\n");
}
#endif
ukupno=moze;
for(i=n;i>=0;i--)
{
for(j=i+1;j<=n;j++)
ukupno+=a[i][j];
if (tablica[i]==4||tablica[i]==1)
break;
}
printf("%lld\n",ukupno);
continue;
kraj:
printf("0\n");
}
}Buggy algorithm CodeChef Solution in JAVA
“import java.io.*;
import java.util.*;
public class Main
{
static Scanner sc = new Scanner(new BufferedInputStream(System.in));
public static void main(String[] args)
{
int t = sc.nextInt();
for(int i=0;i<t;i++)
solveCase();
}
static void solveCase()
{
n = sc.nextInt(); m = sc.nextInt();
init = new int[m];
for(int i=0;i<m;i++)
init[i] = sc.nextInt()-1;
earliest = new boolean[m];
for(int i=0;i<m;i++)
{
int lessCount = 0;
for(int j=0;j<i;j++)
if(init[j]<init[i])
lessCount++;
earliest[i] = lessCount==init[i];
}
memo = new long[n][n+1];
for(long[] arr:memo)
Arrays.fill(arr, -1L);
System.out.println(solve(0, 0));
}
static int m, n;
static long[][] memo;
static int[] init;
static boolean[] earliest;
static long solve(int index, int start)
{
if(index>=n)
return 1;
if(memo[index][start]==-1)
{
long res = 0;
for(int i=start;i<n;i++)
if(index>=m || init[index]==i)
res += solve(index+1, i+1);
if(start>index)
if(index>=m || earliest[index])
res += solve(index+1, start);
memo[index][start] = res;
}
return memo[index][start];
}
}Buggy algorithm CodeChef Solution Review:
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