Niitty

input/code.cpp: In function 'int main()':
input/code.cpp:69:30: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   69 |             if(types.find(d) == -1) {
      |                ~~~~~~~~~~~~~~^~~~~

#include <bits/stdc++.h>
#define ln "\n"
using namespace std;
using ll = long long;
int n;
int ans = 0;
string types = "";
vector<string> vec;

void countSides(int side,int startY, int startX, map<char,int> table) {
        bool hasAll = true;
        map<char,bool> missingY;
        pair<int,int> amountMissing = {0,0};
        pair<int,int> dif = {n-side-startX,n-side-startY};
        for(char v: types) {
            if(table[v] == 0) {
                hasAll = false;
                if(!missingY[v]) {
                    amountMissing.first++;
                    amountMissing.second++;
                }
                missingY[v] = true;
            }
        }
        if(hasAll) {
            ans++;
            ans += dif.first;
            ans += dif.second;
        } else {
            map<char,bool> missingX = missingY;
            while(amountMissing.first> 0 && dif.first > 0) {
                int xAxis = n-dif.first;
                dif.first--;
                for(int i = startY; i < side+startY; i++) {
                    char val = vec[i][xAxis];
                    if(missingX[val]) {
                        missingX[val] = false;
                        amountMissing.first--;
                    }
                }
            }
            while(amountMissing.second > 0 && dif.second > 0) {
                int yAxis = n-dif.second;
                dif.second--;
                for(int i = startX; i < side + startX; i++) {

                    char val = vec[yAxis][i];
                    if(missingY[val]) {
                        missingY[val] = false;
                        amountMissing.second--;
                    }
                }
            }
            if(amountMissing.first == 0) ans++;
            if(amountMissing.second == 0) ans++;
            ans += dif.first;
            ans += dif.second;
        }
}

int main() {
    cin >> n;
    vec.resize(n);
    for(int i = 0; i < n; i++) {
        cin >> vec[i];
    }
    for(int i = 0; i < n; i++) {
        for(char d:vec[i]) {
            if(types.find(d) == -1) {
                types += d;
            }
        }
    }

    for(int side = n; side > 0; side--) {
        map<char,int> table;
        for(int i = 0; i < side; i++) {
            for(int j = 0; j < side; j++) {
                table[vec[i][j]]++;
            }
        }
        map<char,int> temp = table;
        for(int i = 0; i <= n-side; i++) {
            for(int j = 0; j <= n-side; j++) {
                countSides(side,i,j,temp);
                if(j < n-side) {
                    for(int v = i; v < side+i; v++) {
                        temp[vec[v][j]]--;
                    }
                    for(int v = i; v < side+i; v++) {
                        temp[vec[v][j+side]]++;
                    }
                }
            }
            if(i < n-side) {
                for(int j = 0; j < side; j++) {
                    table[vec[i][j]]--;
                }
                for(int j = 0; j < side; j++) {
                    table[vec[i+side][j]]++;
                }
                temp = table;
            }
        }

    }
    cout << ans << ln;
}

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: ACCEPTED

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: ACCEPTED

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: TIME LIMIT EXCEEDED

Test 16

Group: 4, 5, 6

Verdict: ACCEPTED

Test 17

Group: 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 18

Group: 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 19

Group: 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 20

Group: 5, 6

Verdict: ACCEPTED

Test 21

Group: 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 22

Group: 6

Verdict: TIME LIMIT EXCEEDED

Test 23

Group: 6

Verdict: TIME LIMIT EXCEEDED

Test 24

Group: 6

Verdict: TIME LIMIT EXCEEDED

Test 25

Group: 6

Verdict: TIME LIMIT EXCEEDED