Submission #1285241

#	Time	Username	Problem	Language	Result	Execution time	Memory
1285241		alizhan	Knapsack (NOI18_knapsack)	C++20	100 / 100	90 ms	1684 KiB

knapsack

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

signed main() {
    int s, n;
    cin >> s >> n;
    vector<int> dp(s + 1, -1e18);
    vector<pair<int, int>> g[2010];

    for(int i = 1; i <= n; i++) {
        int v, w, k;
        cin >> v >> w >> k;
        g[w].push_back({v, k});
    }

    for(int i = 1; i <= s; i++) {
        sort(g[i].begin(), g[i].end());
    }

    dp[0] = 0;
    for(int i = 1; i <= s; i++) {
        int c = 0;
        for(int k = 1; k <= s / i; k++) {
            if(g[i].size() == 0) break;
            c++;
            for(int j = s; j >= i; j--) {
                if(dp[j - i] == -1e18) continue;
                dp[j] = max(dp[j], dp[j - i] + g[i].back().first);
            }
            g[i].back().second--;
            if(g[i].back().second == 0) g[i].pop_back();
        }
    }

    int mx = 0;
    for(int i = 1; i <= s; i++) {
        mx = max(dp[i], mx);
    }
    cout << mx;

    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:7:27: warning: overflow in conversion from 'double' to 'std::vector<int>::value_type' {aka 'int'} changes value from '-1.0e+18' to '-2147483648' [-Woverflow]
    7 |     vector<int> dp(s + 1, -1e18);
      |                           ^~~~~

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