Submission #607408

#	Time	Username	Problem	Language	Result	Execution time	Memory
607408		codergirl	Knapsack (NOI18_knapsack)	C++14	73 / 100	1079 ms	4684 KiB

knapsack

#include<bits/stdc++.h>

const int maxn=100005;
long variables[maxn][4];
int V;
 
void helper (long cost,long val){
    for(long i=V;i>=cost;i--) {
        variables[i][3]=std::max(variables[i][3],variables[i-cost][3] + val);
    }
    return ;
}

int main() {
    std::ios::sync_with_stdio(false);
    int n;
    std::cin>>V>>n; // knapsack size, n kinds of items
    for(int i=1;i<=n;i++) {
        std::cin>>variables[i][1]>>variables[i][0]>>variables[i][2]; // weight, value, quantity
    }
    for(int i=1;i<=n;i++) {
        long k=1;
        while(k<variables[i][2]){
            helper(k * variables[i][0], k * variables[i][1]);
            variables[i][2]-=k;
            k*=2;
        }
        helper(variables[i][2]*variables[i][0],variables[i][2]*variables[i][1]);
    }
    std::cout<<variables[V][3]<<'\n';
}

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