Submission #1290120

#	Time	Username	Problem	Language	Result	Execution time	Memory
1290120		haha	Knapsack (NOI18_knapsack)	C++20	73 / 100	1095 ms	8396 KiB

knapsack

#include <bits/stdc++.h>
#define f first
#define s second
#define ll long long
using namespace std;

const int maxn = 2005;

int n, S;
vector<int> weight, val;
ll dp[maxn];

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

    cin >> S >> n;
    for (int i = 1; i <= n; i++) {
        int v, w, k;
        cin >> v >> w >> k;
        k = min(k, S / w); 
        int cnt = 1;
        while (k > 0) {
            int take = min(cnt, k);
            k -= take;
            weight.push_back(w * take);
            val.push_back(v * take);
            cnt <<= 1;
        }
    }

    for (int i = 0; i < (int)weight.size(); i++) {
        for (int s = S; s >= weight[i]; s--) {
            dp[s] = max(dp[s], dp[s - weight[i]] + val[i]);
        }
    }

    cout << dp[S];
}

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