Submission #1124780

#	Time	Username	Problem	Language	Result	Execution time	Memory
1124780		_callmelucian	Knapsack (NOI18_knapsack)	C++17	100 / 100	52 ms	3144 KiB

knapsack

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

typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pl;
typedef pair<int,int> pii;
typedef tuple<int,int,int> tpl;

#define all(a) a.begin(), a.end()
#define filter(a) a.erase(unique(all(a)), a.end())

const int mn = 1e5 + 5;
ll V[mn], W[mn], K[mn], dp[2020], used[2020];

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

    int S, n; cin >> S >> n;
    for (int i = 1; i <= n; i++) cin >> V[i] >> W[i] >> K[i];

    vector<int> ord(n);
    for (int i = 1; i <= n; i++) ord[i - 1] = i;
    sort(all(ord), [&] (int a, int b) { return V[a] > V[b]; });

    int t = 0, counter = 0;
    for (int i : ord) {
        for (int iter = 0; iter < K[i]; iter++) {
            if (used[W[i]] * W[i] > S) break;
            for (int j = S; j >= W[i]; j--)
                dp[j] = max(dp[j], dp[j - W[i]] + V[i]);
            used[W[i]]++;
        }
    }
    cout << dp[S];

    return 0;
}

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