Submission #633541

#	Time	Username	Problem	Language	Result	Execution time	Memory
633541		ojoConmigo	Knapsack (NOI18_knapsack)	C++17	12 / 100	1 ms	320 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef long double ld;

struct Item{
    ll v,w,k;

    bool operator<(const Item &rhs){
        return ((ld)((ld)v/(ld)w) < (ld)((ld)rhs.v/(ld)rhs.w));
    }
};

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);

    int s,n;
    cin >> s >> n;
    vector<Item> v(n+1);
    for(int i=1; i<=n; i++){
        cin >> v[i].v >> v[i].w >> v[i].k;
    }
    sort(begin(v),end(v));
    reverse(begin(v),end(v));
    ll w = s;
    ll cont = 0;
    for(int i=0; i<n; i++){
        ll lo = 0, hi = v[i].k, res = 0;
        while(lo <= hi){
            ll mid = (lo+hi)/2;
            if(mid*v[i].w > w){
                hi = mid-1;
            }else{
                res = mid;
                lo = mid+1;
            }
        }
        w -= (res*v[i].w);
        cont += (res*v[i].v);
    }
    cout << cont << endl;
}

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