Submission #1301953

#	Time	Username	Problem	Language	Result	Execution time	Memory
1301953		vaderspader	Knapsack (NOI18_knapsack)	C++20	37 / 100	1 ms	584 KiB

knapsack

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

typedef int ll;
typedef pair<ll, ll> pii;
typedef vector<ll> vi;
typedef vector<vi> matrix;
#define rep(i, a, b) for(ll i = a; i < b; i++)
#define down(i, b, a) for(ll i = b - 1; i >= a; i--)

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    ll s, n;
    cin >> s >> n;

    vi v(0);
    vi w(0);

    rep(i, 0, n){
        ll V, W, K;
        cin >> V >> W >> K;

        ll c = 1;

        while(K > c){
            v.push_back(c * V);
            w.push_back(c * W);
            K -= c;
            c <<= 1;
        }
        v.push_back(K * V);
        w.push_back(K * W);
    }

    n = v.size();

    vi dp(s + 1, 0);

    rep(i, 0, n){
        down(j, s + 1, w[i]){
            dp[j] = max(dp[j], dp[j - w[i]] + v[i]);
        }
    }

    ll best = 0;
    rep(i, 0, s + 1) best = max(best, dp[i]);
    
    cout << best << endl;
}

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