Submission #1257887

#	Time	Username	Problem	Language	Result	Execution time	Memory
1257887		limon4ick	Knapsack (NOI18_knapsack)	C++20	29 / 100	2 ms	328 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 = 2100;
int dp[N];
signed main(){
    //freopen("justcoding.in","r",stdin);
    //freopen("justcoding.out","w",stdout);
    std::ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n,s;
    cin >> s >> n;
    int v[n + 1],w[n + 1],k[n + 1];
    for(int i = 1;i<=n;i++) cin >> v[i] >> w[i] >> k[i];
    if(n==1){
        int sum = 0;
        int ans = 0;
        while(sum+w[1]<=s && k[1]){
            sum+=w[1];
            k[1]--;
            ans+=v[1];
        }
        cout << ans;
        return 0;
    }
    for(int i = 1;i<N;i++) dp[i] = -INT_MAX;
    if(n<=100){
        for(int i = 1;i<=n;i++){
            for(int x = s;x>=0;x--){
                int y = k[i];
                int xz = x;
                while(y-- && xz+w[i]<=s){
                    xz+=w[i];
                    if(dp[x]>=0) dp[xz] = max(dp[x]+v[i],dp[xz]);
                }
            }
        }
        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: 0 / 20
• Subtask 4: 0 / 24
• Subtask 5: 0 / 27