Submission #601446

#	Time	Username	Problem	Language	Result	Execution time	Memory
601446		codergirl	Knapsack (NOI18_knapsack)	C++14	73 / 100	1069 ms	2760 KiB

knapsack

#include<bits/stdc++.h>

const int maxn=100005;
long variables[4][maxn];  //c[maxn],value[maxn],num[maxn], dp[maxn];
int V;
 
void ZeroOnePack (long cost,long val){
    for(long i=V;i>=cost;i--) {
        variables[3][i]=std::max(variables[3][i],variables[3][i-cost] + 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>>variables[1][i]>>variables[0][i]>>variables[2][i]; // weight, value, quantity
    }
    for(int i=1;i<=n;i++) {
        long k=1;
        while(k<variables[2][i]){
            ZeroOnePack(k * variables[0][i], k * variables[1][i]);
            variables[2][i]-=k;
            k*=2;
        }
        ZeroOnePack(variables[2][i]*variables[0][i],variables[2][i]*variables[1][i]);
    }
    std::cout<<variables[3][V]<<'\n';
}

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