Submission #1218810

#	Time	Username	Problem	Language	Result	Execution time	Memory
1218810		ladnoooo	Knapsack (NOI18_knapsack)	C++20	12 / 100	2 ms	1352 KiB

knapsack

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

//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
//#pragma GCC optimize("Ofast,unroll-loops,fast-math,O3")

#define int long long
#define pb push_back

const int maxN = 2e3 + 7;
int dp[maxN][maxN];

void solveStupid() {
    int s, n;
    cin >> s >> n;
    map<int, vector<pair<int, int>>> w;
    for(int i = 0; i < n; i++) {
        int a, b, c;
        cin >> a >> b >> c;
        w[b].pb({a, c});
    }
    int k = 0;
    for(auto &[key, value] : w) {
        k++;
        sort(value.begin(), value.end(), greater<pair<int, int>>());
        for(int i = 0; i <= s; i++) {
            int plus = 0, cur = 0, type = 0, cnt = 0;
            while((cnt + 1) * key <= i && type < value.size()) {
                cnt++;
                plus += value[type].first;
                dp[k][i] = max(dp[k - 1][i], plus + dp[k - 1][i - cnt * key]);
                cur++;
                if(cur == value[type].second) {
                    type++;
                    cur = 0;
                }
            }
        }
    }

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

    cout << mx << '\n';
}

signed main() {
    //freopen("input.txt", "r", stdin);
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int t = 1;
    //cin >> t;
    while (t--) {
        solveStupid();
    }
}

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