Submission #1115106

#	Time	Username	Problem	Language	Result	Execution time	Memory
1115106		duytuandao21	Bob (COCI14_bob)	C++17	0 / 120	175 ms	35304 KiB

bob

#include <bits/stdc++.h>
using namespace std;
#define int long long

const int N = 2e5 + 7;
const int inf = 1e9 + 7;
typedef pair<int, int> pii;

int n, m;
int a[2000][2000], b[2000][2000];
int bit[2000][2000];

void update(int u, int v, int val) {
    for (int i = u; i <= n; i += (i & (-i)))
        for (int j = v; j <= m; j += (j & (-j))) bit[i][j] += val;
} 
int get(int u, int v) {
    int ans = 0;
    for (int i = u; i > 0; i -= (i & (-i)))
        for (int j = v; j > 0; j -= (j & (-j))) ans += bit[i][j];
    return ans;
}
int cal(int x, int y, int u, int v) {
    return get(u, v) - get(u, y - 1) - get(x - 1, v) + get(x - 1, y - 1);
}
signed main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    // freopen("test.inp","r",stdin);
	// freopen("test.out","w",stdout);
    cin >> n >> m;
    for (int i = 1; i <= n; i++) 
        for (int j = 1; j <= m; j++) {
            int x;
            scanf("%lld", &x);
            a[i][j] = x;
        }
    
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            for (int k = j; k <= m + 1; k++) {
                if (a[i][k] != a[i][j]) {
                    b[i][j] = k - 1;
                    break;
                }
            }
        }
    }
    int res = 0;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            int minCol = inf;
            for (int k = i; k <= n; k++) {
                if (a[k][j] != a[i][j]) break;
                minCol = min(minCol, b[k][j]);
                res += minCol - j + 1;
            }
        }
    }
    cout << res;
}

Compilation message (stderr)

bob.cpp: In function 'int main()':
bob.cpp:35:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |             scanf("%lld", &x);
      |             ~~~~~^~~~~~~~~~~~

• Subtask 1: 0 / 12
• Subtask 2: 0 / 12
• Subtask 3: 0 / 12
• Subtask 4: 0 / 12
• Subtask 5: 0 / 12
• Subtask 6: 0 / 12
• Subtask 7: 0 / 12
• Subtask 8: 0 / 12
• Subtask 9: 0 / 12
• Subtask 10: 0 / 12