Submission #1217250

#	Time	Username	Problem	Language	Result	Execution time	Memory
1217250		_ll	Knapsack (NOI18_knapsack)	C++20	73 / 100	1096 ms	15940 KiB

knapsack

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
ll v[9000000], p[9000000], re[2001], m = 0;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    
    ll s, n; cin >> s >> n;
    for(ll i = 0, a, b, q; i < n; i++){
        cin >> a >> b >> q;
        v[m] = a, p[m++] = b;
        ll pd = 1, sm = 1; // um já foi
        while(sm + (pd << ((ll) 1)) <= q){
            pd <<= ((ll) 1), sm += pd;
            v[m] = pd * a, p[m++] = pd * b;
        }
        if(sm < q) v[m] = (q - sm) * a, p[m++] = (q - sm) * b;
    }
    for(ll i = 0; i < m; i++)
        for(ll j = s - p[i]; j >= 0; j--)
            re[j + p[i]] = max(re[j + p[i]], re[j] + v[i]);
    cout << re[s] << '\n';
}

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