Tontti

#include <iostream>
#include <algorithm>
#include <vector>

using namespace std;

vector<pair<pair<int,int>,int> > p;

int h(int **r, int n, int m, int t, int k, int x, int y){
    if (find(p.begin(), p.end(), make_pair(make_pair(x, y),k)) != p.end() ||
            x+1 < k || y+1 < k || x >= m || y >= n) return 0;
    p.push_back(make_pair(make_pair(x, y),k));
    int v = 0;
    int w;
    if (x == k-1 && y == k-1) {w = r[y][x];
    } else if (x == k-1) {w = r[y][x] - r[y-k][x];
    } else if (y == k-1) {w = r[y][x] - r[y][x-k];
    } else {w = r[y][x] - r[y][x-k] - r[y-k][x] + r[y-k][x-k];}
    if (w < t){
        v += h(r, n, m, t, k+1, x+1, y+1); 
    } else if (w > t) {
        v += h(r, n, m, t, k-1, x, y-1);
        v += h(r, n, m, t, k-1, x-1, y);
    } else {
        ++v;
        v += h(r, n, m, t, k+1, x+1, y+1);
        v += h(r, n, m, t, k-1, x, y-1);
        v += h(r, n, m, t, k-1, x-1, y);
    }
    return v;
}

int main(int argc, char** argv) {
    int n, m, t;
    cin >> n >> m >> t;
    string s;
    int **r = new int*[n];
    for (int i = 0; i < n; ++i){
        r[i] = new int[m];
        cin >> s;
        for (int j = 0; j < m; ++j){
            if (i == 0 && j == 0) r[i][j] = s[j] == '*';
            else if (i == 0) r[i][j] = r[i][j-1] + (s[j] == '*');
            else if (j == 0) r[i][j] = r[i-1][j] + (s[j] == '*');
            else r[i][j] = (s[j] == '*') + r[i][j-1] + r[i-1][j] - r[i-1][j-1];
        }
    }
    cout << h(r, n, m, t, 1, 0, 0) << "\n";
    
    return 0;
}

Test 1

Group: 1

Verdict: RUNTIME ERROR

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: WRONG ANSWER

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 7

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 8

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 9

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 10

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 11

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 12

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 13

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 14

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 15

Group: 3

Verdict: TIME LIMIT EXCEEDED