Submission #1118082

#	Time	Username	Problem	Language	Result	Execution time	Memory
1118082		vjudge1	Knapsack (NOI18_knapsack)	C++14	12 / 100	1 ms	336 KiB

knapsack

#include <bits/stdc++.h>
#define sts(v) stable_sort(v.BE, v.E)
#define Rsts(v) stable_sort(v.rBE, v.rE)
#define rev(v) reverse(v.BE, v.E)
#define BE begin()
#define rBE rbegin()
#define E end()
#define rE rend()
#define pb push_back
#define ppb pop_back()
#define pf push_front
#define ppf pop_front()
#define F first
#define S second

using namespace std;
using ll = long long;

struct datos{
    int val, w, k;
};

int main(){
    ios_base::sync_with_stdio(0); 
    cin.tie(0); cout.tie(0);

    int W, n; cin >> W >> n;
    datos v[n];

    for(int i = 0; i < n; i++){
        int val, w, k; cin >> val >> w >> k;
        
        v[i] = {val, w, k};
    }
    vector<bool> cmp(n);
    ll ans = 0;
    while(W){
        datos maxi = {0, 0, -1};
        bool used = 0;

        for(int i = 0; i < n; i++){
            if(cmp[i])continue;

            int val = v[i].val, w = v[i].w, k = v[i].k;
            int _w = 0; ll _val = 0;

            while(_w + w <= W && k--){
                _w += w;
                _val += val;
            }
            if(_val > maxi.val)
                maxi = {_val, _w, i};
        }
        
        if(maxi.k != -1){
            cmp[maxi.k] = 1;
            ans += maxi.val;
            W -= maxi.w;
            used = 1;
        }

        if(!used)break;
    }

    cout << ans;

    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:52:25: warning: narrowing conversion of '_val' from 'll' {aka 'long long int'} to 'int' [-Wnarrowing]
   52 |                 maxi = {_val, _w, i};
      |                         ^~~~

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