Submission #1042133

#	Time	Username	Problem	Language	Result	Execution time	Memory
1042133		VMaksimoski008	Catfish Farm (IOI22_fish)	C++17	35 / 100	88 ms	11708 KiB

fish

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

ll pref[305][305], dp[305][305][2];
 
ll max_weights(int N, int M, vector<int> X, vector<int> Y, vector<int> W) {
    for(int i=0; i<M; i++) pref[X[i]+1][Y[i]+1] += W[i];
    for(int i=1; i<=N; i++)
        for(int j=1; j<=N; j++) pref[i][j] += pref[i][j-1];

    for(int i=2; i<=N; i++) {
        for(int j=0; j<=N; j++) {
            for(int k=0; k<=N; k++) {
                if(j >= k) dp[i][j][1] = max(dp[i][j][1], dp[i-1][k][1] + pref[i-1][j] - pref[i-1][k]);
                if(j <= k) dp[i][j][0] = max(dp[i][j][0], max(dp[i-1][k][0], dp[i-1][k][1]) + pref[i][k] - pref[i][j]);
                if(i >= 3) dp[i][j][0] = max(dp[i][j][0], max(dp[i-2][k][0], dp[i-2][k][1]) + max(pref[i-1][j], pref[i-1][k]));
                if(i >= 3) dp[i][j][1] = max(dp[i][j][1], max(dp[i-2][k][0], dp[i-2][k][1]) + max(pref[i-1][j], pref[i-1][k]));
            }
        }
    }

    ll ans = 0;
    for(int i=1; i<=N; i++)
        for(int j=1; j<=N; j++) ans = max({ ans, dp[i][j][0] + pref[i+1][j], dp[i][j][1] + pref[i+1][j] });
    return ans;
}

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