Submission #722827

#	Time	Username	Problem	Language	Result	Execution time	Memory
722827		drdilyor	Catfish Farm (IOI22_fish)	C++17	0 / 100	714 ms	2097152 KiB

fish

#include "fish.h"

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

ll max_weights(
    int n, int m, vector<int> x, vector<int> y, vector<int> w) {
    vector arr(n+1, vector(n+1, 0ll));
    for (int i = 0; i < m; i++)
        arr[x[i]+1][y[i]] += w[i];

    for (int c = 0; c <= n; c++) {
        for (int i = 0; i < n; i++)
            arr[c][i+1] += arr[c][i];
    }

    auto sum = [&](int c, int l, int r) { // [l, r)
        return arr[c][r] - arr[c][l];
    };

    vector memo(n+1, vector(n+1, vector(n+1, -1ll)));
    auto dp = [&](auto& dp, int c, int h1, int h2)->ll{
        if (c == n+1) return 0;
        ll& res = memo[c][h1][h2];
        if (res!=-1) return res;
        res = 0;
        for (int h3 = 0; h3 <= n; h3++) {

            ll val = sum(c-1, h2, h3)
                - sum(c-1, h2, h1)
                + sum(c-1, h3, h1)
                + sum(c-1, h3, h2);
            res = max(res, val + dp(dp, c+1, h2, h3));
        }
        return res;
    };
    ll res = dp(dp, 1, 0, 0);
    return res;

}

• 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