Submission #439472

#	Time	Username	Problem	Language	Result	Execution time	Memory
439472		Idkwhoami	Detecting Molecules (IOI16_molecules)	C++17	19 / 100	1 ms	216 KiB

molecules

#include<bits/stdc++.h>

using namespace std;

vector<int> find_subset(int l, int u, vector<int> w){
    int n = w.size();
    
    vector<pair<int, int>> v(n);
    vector<int> pf(n);

    for(int i = 0;i<n;i++){
        v[i].first = w[i];
        v[i].second = i;
    }
    pf[0] = v[0].first;
    
    sort(v.begin(), v.end());
    for(int i = 1;i<n;i++)pf[i] = pf[i-1] + v[i].first;

    map<int, int> pos;
    for(int i = 0;i<n;i++){
        pos[pf[i]] = i;
    }

    for(int i = 0;i<n;i++){

        if(pf[i] < l)continue;
        if(pf[i] >= l && pf[i] <= u){
            vector<int> a(i+1);
            for(int j = 0;j<=i;j++)a[j] = v[j].second;

            return a;
        }

        int req = pf[i] - u;
        auto itr = lower_bound(pf.begin(), pf.end(), req);
        if(pf[i] - *itr >= l && pf[i] - *itr <= u){
            vector<int> a(i - pos[*itr]);
            for(int j = pos[*itr] + 1, k = 0; j <= i;j++,k++)a[k] = v[j].second;
            return a;
        }                
    }
    return vector<int>{};
}

• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 0 / 12
• Subtask 4: 0 / 15
• Subtask 5: 0 / 23
• Subtask 6: 0 / 31