Submission #1261458

#	Time	Username	Problem	Language	Result	Execution time	Memory
1261458		limon4ick	Knapsack (NOI18_knapsack)	C++20	100 / 100	35 ms	1624 KiB

knapsack

/*#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimization("unroll-loops")
#pragma ("reroll") */
#include <bits/stdc++.h>
using namespace std;
//#define int long long
#define pb push_back
#define ins insert
#define F first
#define S second
const int mod = 1e7 + 7,N = 2e3 + 100,mx = (int)(1e6 + 100);
vector<pair<int,int>>g[N];
int dp[N];
signed main(){
    //freopen("justcoding.in","r",stdin);
    //freopen("justcoding.out","w",stdout);
    std::ios::sync_with_stdio(false);
    cin.tie(0);
    int n,s;
    cin >> s >> n;
    for(int i = 1;i<=n;i++){
        int u,w,k;
        cin >> u >> w >> k;
        g[w].pb({u,k});
    }
    for(int i = 1;i<=s;i++){
        if(!g[i].size()) continue;
        sort(g[i].rbegin(),g[i].rend());
    }
    for(int i = 1;i<N;i++) dp[i] = -INT_MAX;
    dp[0] = 0;
    for(int i = 1;i<=s;i++){
        if(g[i].size()==0) continue;
        for(int x = s;x>=0;x--){
            int xz = x;
            int cnt = 0;
            int j = 0;
            int sum = 0;
            int y = g[i][j].F,y1 = g[i][j].S;
            while(xz+i<=s){
                xz+=i;
                sum+=y;
                y1--;
                if(dp[x]>=0) dp[xz] = max(dp[x]+sum,dp[xz]);
                if(y1==0) {j++;y = g[i][j].F;y1 = g[i][j].S;}
                if(j==g[i].size()) break;
            }
        }
    }
    int ans = 0;
    for(int i = 0;i<=s;i++){
        ans = max(ans,dp[i]);
    }
    cout << ans;
}

• Subtask 1: 12 / 12
• Subtask 2: 17 / 17
• Subtask 3: 20 / 20
• Subtask 4: 24 / 24
• Subtask 5: 27 / 27