Submission #595366

#	Time	Username	Problem	Language	Result	Execution time	Memory
595366		yaroslav06	Knapsack (NOI18_knapsack)	C++14	100 / 100	60 ms	3564 KiB

knapsack

#include <iostream>
#include <algorithm>

const int N = 2001, M = 1e5;

using namespace std;
typedef long long ll;

int s, n;
pair<int, pair<int, int>> d[M];

bool comp(pair<int, pair<int, int>> a, pair<int, pair<int, int>> b){
    return a.second.first > b.second.first;
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int dp[N][2]{};
    int sm[N]{};
    cin >> s >> n;
    for(int i = 0; i < n; ++i)
        cin >> d[i].second.first >> d[i].first >> d[i].second.second;
    sort(d, d + n, comp);
    for(int i = 0; i < n; ++i){
        int k = d[i].second.second,
            v = d[i].second.first,
            w = d[i].first;
        if(sm[w] >= 2000) continue;
        sm[w] += min(k * 1ll * w, 2000ll);
        for(int j = 1; j <= k && j * w <= s; ++j)
            for(int t = s; t - j * w >= 0; --t)
                dp[t][1] = max(dp[t][1], dp[t - j * w][0] + j * v);
        for(int j = 0; j <= s; ++j)
            dp[j][0] = dp[j][1];
    }
    cout << dp[s][0] << '\n';
}

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