제출 #1294986

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1294986		notshek	Knapsack (NOI18_knapsack)	C++20	100 / 100	45 ms	3588 KiB

knapsack

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

typedef long long ll;
typedef long double ld;

#define pii pair <int, int>

const int N = 1e5 + 10;
const int S = 2000 + 10;
const ll INF = 1e18;

ll n, k[N], s, q[N];
ll v[N], w[N], dp[S], cnt[S];

signed main() {
    ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
    cin >> s >> n;
    for (int i = 0; i < n; i++) {
        cin >> v[i] >> w[i] >> k[i];
    }
    iota(q, q + n, 0);
    sort(q, q + n, [] (int i, int j) {
        if (v[i] != v[j]) return v[i] > v[j];
        return i < j;
    });
    fill(dp, dp + S, -INF);
    dp[0] = 0;
    for (int ii = 0; ii < n; ii++) {
        int i = q[ii];
        for (int t = 0; t < k[i]; t++) {
            if (cnt[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]);
            }
            cnt[w[i]]++;
        }
    }
    cout << *max_element(dp, dp + S) << '\n';
    return 0;
}

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