Submission #1073241

#	Time	Username	Problem	Language	Result	Execution time	Memory
1073241		Zicrus	Catfish Farm (IOI22_fish)	C++17	0 / 100	840 ms	2097152 KiB

fish

    #include <bits/stdc++.h>
    #include "fish.h"
    using namespace std;
     
    typedef long long ll;
     
    int n, m;
    vector<int> x, y, w;
     
    ll max_weights(int N, int M, vector<int> X, vector<int> Y, vector<int> W) {
        n = N; m = M; x = X; y = Y; w = W;
        vector<vector<ll>> a(n, vector<ll>(n));
        for (int i = 0; i < m; i++) {
            a[x[i]][y[i]] = w[i];
        }
        vector<vector<ll>> dp(n, vector<ll>(n));
        vector<vector<ll>> dpNo(n, vector<ll>(n));
        for (int i = 1; i < n; i++) {
            for (int j = 0; j < min(n, 10); j++) {
                for (int j1 = 0; j1 < min(n, 10); j1++) {
                    // next to i
                    ll val = dpNo[i-1][j1];
                    for (int k = j+1; k <= j1; k++) {
                        val += a[i][k];
                    }
                    for (int k = j1+1; k <= j; k++) {
                        val += a[i-1][k];
                    }
                    dp[i][j] = max(dp[i][j], val);
                }
                for (int i1 = i-2; i1 >= 0 && i1 >= i-5; i1--) {
                    for (int j1 = 0; j1 < min(n, 10); j1++) {
                        ll val = dp[i1][j1];
                        if (i1 == i-2) {
                            for (int k = 0; k <= max(j, j1); k++) {
                                val += a[i-1][k];
                            }
                        }
                        else {
                            for (int k = 0; k <= j; k++) {
                                val += a[i-1][k];
                            }
                            for (int k = 0; k <= j1; k++) {
                                val += a[i1+1][k];
                            }
                        }
                        dp[i][j] = max(dp[i][j], val);
                        dpNo[i][j] = max(dpNo[i][j], val);
                    }
                }
            }
        }
        ll res = 0;
        for (int j = 0; j < min(n, 10); j++) {
            res = max(res, dp[n-1][j]);
        }
        for (int i = n-2; i >= n-5 && i >= 0; i--) {
            for (int j = 0; j < min(n, 10); j++) {
                ll val = dp[i][j];
                for (int k = 0; k <= j; k++) {
                    val += a[i+1][k];
                }
                res = max(res, val);
            }
        }
        return res;
    }
     
    #ifdef TEST
    #include "grader.cpp"
    #endif

• Subtask 1: 0 / 3
• Subtask 2: 0 / 6
• Subtask 3: 0 / 9
• Subtask 4: 0 / 14
• Subtask 5: 0 / 21
• Subtask 6: 0 / 17
• Subtask 7: 0 / 14
• Subtask 8: 0 / 16