Submission #601187

#	Time	Username	Problem	Language	Result	Execution time	Memory
601187		codergirl	Knapsack (NOI18_knapsack)	C++14	37 / 100	2 ms	468 KiB

knapsack

#include <bits/stdc++.h>

const int maxn=100005;
int c[maxn],value[maxn],num[maxn];
int dp[maxn];
int V;

void ZeroOnePack (int cost,int val){
    for(int i=V;i>=cost;i--)
        dp[i]=std::max(dp[i],dp[i-cost] + val);
    return ;
}

void MultiplePack(int cost, int val, int tot){
    int k=1;
    while(k<tot){
        ZeroOnePack(k * cost, k * val);
        tot=tot-k;
        k=k*2;
    }
    ZeroOnePack(tot*cost,tot*val);
    return ;
}
int main(){
    int n;
    std::cin>>V>>n; // knapsack size V, n kinds of items
    for(int i=1;i<=n;i++)
        std::cin>>value[i]>>c[i]>>num[i]; // weight, value, quantity
    for(int i=1;i<=n;i++)
        MultiplePack(c[i], value[i], num[i]);
    std::cout<<dp[V]<<'\n';
    return 0;
}

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