Submission #925246

#	Time	Username	Problem	Language	Result	Execution time	Memory
925246		IS_Rushdi	Catfish Farm (IOI22_fish)	C++17	32 / 100	72 ms	16720 KiB

fish

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


long long max_weights(int n,int m,vector<int>x,vector<int>y,vector<int>w){
    int mx = *max_element(y.begin(),y.end());
    if(mx <= 8){
        long long dp[n+1][mx+2][mx+2]{};
        int sum[n+1][mx+2]{};
        for(int i = 0; i < m; i++) x[i] += 1;
        for(int i = 0; i < m; i++) y[i] += 1;
        for(int i = 0; i < m; i++) sum[x[i]][y[i]] += w[i];
        long long ans = 0;
        
        for(int i = 0; i < 1; i++){
            for(int j = 0; j < mx+2; j++){
                for(int k = 0; k < mx+2; k++){
                    dp[i][j][k] = -1e18;
                }
            }
        }
        dp[0][0][0] = 0;
        for(int i = 1; i <= n; i++){
            for(int j = 0; j < mx+2; j++){
                for(int k = 0; k < mx+2; k++){
                    for(int v = 0; v < mx+2; v++){
                        long long now = dp[i-1][k][j];
                        int cur = v;
                        while(cur > max(j,k)) now += sum[i-1][cur--];
                        cur = k;
                        while(cur > v) now += sum[i][cur--];
                        
                        dp[i][v][k] = max(dp[i][v][k],now);
                        ans = max(ans,now);
                    }
                }
            }
        }
        return ans;
    }
    
    mx = *max_element(x.begin(),x.end());
    if(mx <= 1){
            long long ans = 0;
        long long ans2 = 0;
        int cost[n][2]{};
        for(int i = 0; i < m; i++){
            if(x[i] == 1){cost[y[i]][1] = w[i]; ans += w[i];}
            if(x[i] == 0){ans2 += w[i];cost[y[i]][0]=w[i];}
        }
        if(n == 2 || n == 1) return max(ans,ans2);
        ans2 = max(ans,ans2);
        
        for(int i = 1; i < n; i++){
            ans -= cost[i-1][1];
            ans += cost[i-1][0];
    
            ans2 = max(ans2,ans);
        }
        return ans2;
    }else{
        long long sum = 0;
        for(int i = 0; i < m; i++) sum += w[i];
        return sum;
    }
}

// int main(){
//     cout << max_weights(5, 4, {0, 1, 4, 3}, {2, 1, 4, 3}, {5, 2, 1, 3}) << '\n';
// }

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