Submission #1070102

#	Time	Username	Problem	Language	Result	Execution time	Memory
1070102		beaconmc	Catfish Farm (IOI22_fish)	C++17	0 / 100	1080 ms	5720 KiB

fish

// #pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include "fish.h"

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

typedef long long ll;
#define FOR(i,x,y) for(ll i=x; i<y; i++)
#define FORNEG(i,x,y) for(ll i=x; i>y; i--)

const ll maxn = 305;


bool fish[maxn][maxn];
ll weights[maxn][maxn];


ll dp[maxn][maxn][2];



long long max_weights(int N, int M, std::vector<int> X, std::vector<int> Y,
                      std::vector<int> W) {
    FOR(i,0,maxn){
        FOR(j,0,maxn){
                fish[i][j] = false;
                dp[i][j][0] = 0;
                dp[i][j][1] = 0;
        }
    }

    FOR(i,0,M){
        Y[i]++;
        fish[X[i]][Y[i]] = true;
        weights[X[i]][Y[i]] = W[i];
    }

    FOR(i,0,N){
        FOR(j,0,N+1){
            FOR(k,0,2){
                ll temp = 0;
                FOR(height,0,N+1){
                    if (k==0){
                        if (fish[i][height] && j >= height) temp -= weights[i][height];
                        if (fish[i+1][height]) temp += weights[i+1][height];
                    }else{
                        if (fish[i+1][height]) temp += weights[i+1][height];
                        if (fish[i][height] && j >= height) temp -= weights[i][height];
                        if (i > 0 && fish[i-1][height] && j < height) temp += weights[i-1][height];
                    }

                    if (height < j) dp[i+1][height][0] = max(dp[i+1][height][0], dp[i][j][k] + temp);
                    else dp[i+1][height][1] = max(dp[i+1][height][1], dp[i][j][k] + temp);
                }
            }
        }
    }
    ll ans = 0;
    FOR(i,0,N) FOR(j,0,N+1)FOR(k,0,2) ans = max(ans, dp[i][j][k]);
    return ans;







}

• 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