Niitty

input/code.cpp: In function 'int main()':
input/code.cpp:46:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |         scanf("%d",&n);
      |         ~~~~~^~~~~~~~~

#include <bits/stdc++.h>

using namespace std;

#define IC(c) (int)(c-'A')

const int N=509;
const int F=26;
int n,C;

int pre[N][N][F+1];
int compact[N][F+1];
//pre[i][j][c] : prefix sum
//compact[j][c] for every array[top,btm]
//the compacted prefix sum
int idx[F+1];//char-int list

int sum(int x1,int y1,int x2,int y2,int id){
	return pre[x2][y2][id]-pre[x1-1][y2][id]-pre[x2][y1-1][id]+pre[x1-1][y1-1][id];
}

bool check(int x1,int y1,int x2,int y2){
	for(int id=1;id<=C;id++){
		if(sum(x1,y1,x2,y2,id)==0)
			return false;
	}
	return true;
}

int cpc_sum(int l,int r,int id){//sum for compact[]
	return compact[r][id]-compact[l-1][id];
}

bool cpc_check(int l,int r){//check for compact[]
	int tms=1;
	for(int id=1;id<=C;id++){
  		tms*=cpc_sum(l,r,id);
	}
	return tms;
}

int ans;
//sum up answer

int main(){
	scanf("%d",&n);
	for(int i=1;i<=n;i++)
		for(int j=1;j<=n;j++){
			char c;
			cin>>c;
			int id=IC(c);
			if(!idx[id]){
				C++;
				idx[id]=C;
			}
			for(int k=1;k<=C;k++){
				if(k==idx[id])
					pre[i][j][k]=pre[i-1][j][k]+pre[i][j-1][k]-pre[i-1][j-1][k]+1;
				else
					pre[i][j][k]=pre[i-1][j][k]+pre[i][j-1][k]-pre[i-1][j-1][k];
			}
		}
	//input ends here

	//for every [top,btm] in [1,n]
	for(int top=1;top<=n;top++){
		for(int btm=top;btm<=n;btm++){//O(n^2)
			if(!check(top,1,btm,n))continue;
			int l=1,r=1;
			//scan the array
			while(r<=n){//O(n)
				for(int id=1;id<=C;id++)
					compact[r][id]=sum(top,1,btm,r,id);
				while(cpc_check(l+1,r)&&l<r){
					l++;
				}
				if(cpc_check(l,r))ans+=l;
				r++;
			}
		}
	}

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

Test 1

Group: 1, 2, 3, 4, 5, 6

Verdict: ACCEPTED

Test 2

Group: 1, 2, 3, 4, 5, 6

Verdict: ACCEPTED

Test 3

Group: 1, 2, 3, 4, 5, 6

Verdict: ACCEPTED

Test 4

Group: 1, 2, 3, 4, 5, 6

Verdict: ACCEPTED

Test 5

Group: 1, 2, 3, 4, 5, 6

Verdict: ACCEPTED

Test 6

Group: 2, 3, 4, 5, 6

Verdict: ACCEPTED

Test 7

Group: 2, 3, 4, 5, 6

Verdict: WRONG ANSWER

Test 8

Group: 2, 3, 4, 5, 6

Verdict: ACCEPTED

Test 9

Group: 2, 3, 4, 5, 6

Verdict: ACCEPTED

Test 10

Group: 3, 4, 5, 6

Verdict: ACCEPTED

Test 11

Group: 3, 4, 5, 6

Verdict: WRONG ANSWER

Test 12

Group: 3, 4, 5, 6

Verdict: ACCEPTED

Test 13

Group: 3, 4, 5, 6

Verdict: ACCEPTED

Test 14

Group: 4, 5, 6

Verdict: ACCEPTED

Test 15

Group: 4, 5, 6

Verdict: WRONG ANSWER

Test 16

Group: 4, 5, 6

Verdict: ACCEPTED

Test 17

Group: 4, 5, 6

Verdict: WRONG ANSWER

Test 18

Group: 5, 6

Verdict: ACCEPTED

Test 19

Group: 5, 6

Verdict: WRONG ANSWER

Test 20

Group: 5, 6

Verdict: ACCEPTED

Test 21

Group: 5, 6

Verdict: WRONG ANSWER

Test 22

Group: 6

Verdict: TIME LIMIT EXCEEDED

Test 23

Group: 6

Verdict: TIME LIMIT EXCEEDED

Test 24

Group: 6

Verdict: WRONG ANSWER

Test 25

Group: 6

Verdict: TIME LIMIT EXCEEDED