Submission #1134581

#	Time	Username	Problem	Language	Result	Execution time	Memory
1134581		Pekiban	Dango Maker (JOI18_dango_maker)	C++20	33 / 100	3 ms	584 KiB

dango_maker

#include <bits/stdc++.h>

using namespace std;
int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n, m;
    cin >> n >> m;
    char a[n+1][m+1];
    for (int i = 1; i <= n; ++i) {
        for (int j = 1; j <= m; ++j) {
            cin >> a[i][j];
        }
    }
    int H[n+1][m+1][2];
    for (int i = 1; i <= n; ++i) {
        for (int j = 1; j <= m; ++j) {
            H[i][j][0] = (j >= 2 && a[i][j] == 'G' && a[i][j-1] == 'R' && a[i][j+1] == 'W');
            H[i][j][1] = (i >= 2 && a[i][j] == 'G' && a[i-1][j] == 'R' && a[i+1][j] == 'W');
        }
    }
    int ans = 0;
    for (int k = 2; k <= n+m; k++) {
        int dp[k][3], t = 0; // 1 za vertikalne (1), 2 za horizontalne (0);
        // if (m == 3000 && k >= 1000) {
        //     cout << 5 << '\n';
        //     return 0;
        // }
        for (int i = 0; i < k; ++i) dp[i][0] = dp[i][1] = dp[i][2] = 0;
        for (int i = max(1, k - m); i < min(k, n+1); ++i) {
            dp[i][0] = max({dp[i-1][0], dp[i-1][1], dp[i-1][2]});
            dp[i][1] = H[i][k-i][1] + max({dp[i-1][0], dp[i-1][1]});
            dp[i][2] = H[i][k-i][0] + max({dp[i-1][0], dp[i-1][2]});
            t = max({t, dp[i][0], dp[i][1], dp[i][2]});
        }
        ans += t;
    }
    cout << ans << '\n';
}

• Subtask 1: 13 / 13
• Subtask 2: 20 / 20
• Subtask 3: 0 / 67