Submission #770456

#	Time	Username	Problem	Language	Result	Execution time	Memory
770456		Magikarp4000	Catfish Farm (IOI22_fish)	C++17	0 / 100	1084 ms	130652 KiB

fish

#include "fish.h"
#include <bits/stdc++.h>
using namespace std;
#define OPTM ios_base::sync_with_stdio(0); cin.tie(0);
#define INF int(1e9+7)
#define ln '\n' 
#define ll long long
#define ull unsigned long long
#define ui unsigned int
#define us unsigned short
#define FOR(i,s,n) for (int i = s; i < n; i++)
#define FORR(i,n,s) for (int i = n; i > s; i--)
#define FORX(u, arr) for (auto u : arr)
#define PB push_back
#define in(v,x) (v.find(x) != v.end())
#define F first
#define S second
#define PII pair<int, int>
#define PLL pair<ll, ll>
#define UM unordered_map
#define US unordered_set
#define PQ priority_queue
#define ALL(v) v.begin(), v.end()
const ll LLINF = 1e18+1;
#define int long long

const int MAXN = 3e3+5;
int n,m;
int dp[MAXN][MAXN], g[MAXN][MAXN], p[MAXN][MAXN];
int cnt[MAXN][MAXN];

long long max_weights(int32_t N, int32_t M, std::vector<int32_t> X, std::vector<int32_t> Y, std::vector<int32_t> W) {
    n = N; m = M;
    FOR(i,0,m) g[X[i]][Y[i]] = W[i];
    FOR(i,1,n+1) {
        FOR(j,1,n+1) {
            p[i][j] = p[i][j-1]+g[i-1][j-1];
        }
    }
    // FORR(j,n,0) {
    //     FOR(i,1,n+1) cout << p[i][j] << " ";
    //     cout << ln;
    // }
    // cout << ln;
    FOR(i,2,n+1) {
        FOR(j,0,n) {
            FOR(k,0,n) {
                if (j > k) {
                    int cur = dp[i-1][k]+(p[i-1][j+1]-p[i-1][k+1])-max(0LL,(p[i-1][cnt[i-1][k]+1]-p[i-1][k+1]));
                    if (cur > dp[i][j]) {
                        dp[i][j] = cur;
                        cnt[i][j] = j;
                    }
                }
                else {
                    if (dp[i-1][k]+p[i][k+1]-p[i][j+1] > dp[i][j]) {
                        dp[i][j] = dp[i-1][k]+p[i][k+1]-p[i][j+1];
                        cnt[i][j] = k;
                    }
                }
            }
        }
    }
    // FORR(j,n-1,-1) {
    //     FOR(i,0,n+1) cout << dp[i][j] << " ";
    //     cout << ln;
    // }
    int res = -LLINF;
    FOR(j,0,n) res = max(res, dp[n][j]);
    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