Submission #442051

#	Time	Username	Problem	Language	Result	Execution time	Memory
442051		asdf1234coding	Knapsack (NOI18_knapsack)	C++14	100 / 100	137 ms	3652 KiB

knapsack

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

#define ff first
#define ss second
#define MOD 1000000009

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

int main() {
    int s, n;
    cin >> s >> n;

    vector<vector<pair<int,int> > > wvk(s + 1);

    for(int i = 0; i < n; i++) {
        int v, w, k;
        cin>>v>>w>>k;
        wvk[w].push_back(make_pair(v, k));
    }

    for(int i = 0; i <= s; i++) sort(wvk[i].begin(), wvk[i].end(), comp);

    vector<int> dp(s + 1, 0);
    dp[0] = 0;

    for(int i = 1; i <= s; i++) {
        int used = 0;
        for(auto each : wvk[i]) {
            for(int count = 1; count <= each.ss; count++) {
                used += i;
                if(used > s) break;
                for(int left = s; left >= used; left--) {
                    dp[left] = max(dp[left], dp[left - i] + each.ff);
                }
            }
            if(used > s) break;
        }
    }

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

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