Submission #1205072

#	Time	Username	Problem	Language	Result	Execution time	Memory
1205072		jenterjongle45	Knapsack (NOI18_knapsack)	C++20	73 / 100	1096 ms	328 KiB

knapsack

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using pii=pair<ll,ll>;
const int N=2020;
int s,n;
ll dp[N];
void calc(ll v,ll w){
    for(int i=s;i>=w;i--){
        dp[i]=max(dp[i],dp[i-w]+v);
    }
}
int main(){
    cin.tie(0)->sync_with_stdio(0);
    cin>>s>>n;
    for(int i=0;i<n;i++){
        ll v,w,k,now=1,kk;cin>>v>>w>>k;
        kk=k;
        while(now<=kk&&kk>0&&now*w<=s){
            calc(v*now,w*now);
            kk-=now;
            now<<=1;
        }
        if(kk>0&&kk*w<=s) calc(v*kk,kk*w);
    }
    cout<<dp[s];
}

• Subtask 1: 12 / 12
• Subtask 2: 17 / 17
• Subtask 3: 20 / 20
• Subtask 4: 24 / 24
• Subtask 5: 0 / 27