Submission #476285

#	Time	Username	Problem	Language	Result	Execution time	Memory
476285		Vianti	Knapsack (NOI18_knapsack)	C++17	100 / 100	81 ms	19424 KiB

knapsack

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
const ll MOD = 1e9 + 7;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int s, n;
    cin >> s >> n;
    vector<vector<pii>> a(s + 1);
    for (int i = 0; i < n; i++) {
        int v, w, k;
        cin >> v >> w >> k;
        a[w].push_back({v, k});
    }
    for (int i = 0; i <= s; i++) {
        sort(a[i].rbegin(), a[i].rend());
    }
    vector<vector<int>> dp(s + 1, vector<int>(s + 1, 0));
    for (int i = 1; i <= s; i++) {
        for (int j = 0; j <= s; j++) {
            int curw = 0;
            int curv = 0;
            dp[i][j] = max(dp[i - 1][j], dp[i][j]);
            for (auto &el: a[i]) {
                for (int p = 0; p < el.second; p++) {
                    curw += i;
                    curv += el.first;
                    if (curw > j)break;
                    dp[i][j] = max(dp[i][j], dp[i - 1][j - curw] + curv);
                }
                if (curw > j)break;
            }
        }
    }
    int ans = 0;
    for (int i = 0; i <= s; i++) {
        ans = max(ans, dp[s][i]);
    }
    cout << ans << endl;
}

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