제출 #1032998

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1032998		Mr_Husanboy	메기 농장 (IOI22_fish)	C++17	52 / 100	867 ms	2097152 KiB

fish

#include "fish.h"
#include <bits/stdc++.h>
 
using namespace std;
 
#define ff first
#define ss second
#define all(a) (a).begin(), (a).end()
#define ll long long
 
template<typename T>
int len(T &a){
    return a.size();
}
 
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
 
 
long long max_weights(int n, int m, std::vector<int> x, std::vector<int> y,
                      std::vector<int> w) {
    vector<vector<ll>> s(n + 1, vector<ll> (n + 1));
 
    for(int i = 0; i < m; i ++) s[x[i] + 1][y[i] + 1] = w[i];
    for(int i = 1; i <= n; i ++) for(int j = 1; j <= n; j ++) s[i][j] += s[i][j - 1];
 
    vector<vector<array<ll, 2>>> dp(n + 1, vector<array<ll, 2>>(n + 1));
    for(int j = 0; j <= n; j ++){
        dp[2][j][0] = s[1][j];
    }
    for(int i = 2; i <= n; i ++){
        ll mx = 0;
        ll mx2 = 0;
        vector<ll> suf(n + 1);
        for(int j = n; j >= 0; j --){
            mx2 = max(mx2, max(dp[i - 2][j][0], dp[i - 2][j][1]) + s[i - 1][j]);
            suf[j] = mx2;
        }
        mx2 = 0;
        for(int j = 0; j <= n; j ++){
            mx2 = max({mx2, dp[i - 2][j][0], dp[i - 2][j][1]});
            if(i > 2) dp[i][j][0] = max(mx2 + s[i - 1][j], suf[j]);
            dp[i][j][1] = dp[i][j][0];
            mx = max(mx, dp[i - 1][j][0] - s[i - 1][j]);
            dp[i][j][0] = max(dp[i][j][0], mx + s[i - 1][j]);
        }
        mx = 0;
        for(int j = n; j >= 0; j --){
            mx = max(mx, max(dp[i - 1][j][0], dp[i - 1][j][1]) - (s[i][n] - s[i][j]));
            dp[i][j][1] = max(dp[i][j][1], mx + (s[i][n] - s[i][j]));
        }
    }
    ll ans = 0;
    for(int i = 0; i <= n; i ++){
        ans = max({ans, dp[n][i][0], dp[n][i][1]});
        //cout << dp[n][i][0] << ' ' << dp[n][i][1] << endl;
    }
 
    return ans;
}

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