Submission #1003538

#	Time	Username	Problem	Language	Result	Execution time	Memory
1003538		zh_h	Detecting Molecules (IOI16_molecules)	C++17	69 / 100	40 ms	5576 KiB

molecules

#include <bits/stdc++.h>
#define lint long long int
#define pb push_back
using namespace std;

vector<int> find_subset(int l, int u, vector<int> w){
    vector<pair<int, int>> v;
    for(int i = 0; i < w.size(); i ++){
        v.pb({w[i], i});
    }
    sort(w.begin(), w.end());
    sort(v.begin(), v.end());

    int ll = 0, rr = 0;
    // int sum = w[0];
    int sum = v[0].first;

    bool check = true;

    while(!(sum <= u && sum >= l)){
        if(ll > rr){check = false; break;}
        else if(ll < 0){check = false; break;}
        else if(rr > w.size()-1){check = false; break;}
        else if(sum > u){
            // sum-= w[ll];
            sum -= v[ll].first;
            ll++;
        }
        else if(sum < l){
            rr++;
            // sum+=w[rr];
            sum+=v[rr].first;
        }

        // cout << ll << " " << rr << endl;
    }

    vector<int> ans;
    if(!check){return ans;}
    else{
        for(int i = ll; i <= rr; i ++){
            // ans.pb(w[i]);
            ans.pb(v[i].second);
        }
        sort(ans.begin(), ans.end());
        return ans;
    }


    
}

// int main(){
//     vector<int> temp;
//     temp = find_subset(15, 17, {6, 8, 8, 7});
//     // temp = find_subset(10, 20, {15, 17, 16, 18});
//     // temp = find_subset(14, 15, {5, 5, 6, 6});
//     for(auto i : temp){cout << i << " ";} cout << endl;

// }

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:8:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for(int i = 0; i < w.size(); i ++){
      |                    ~~^~~~~~~~~~
molecules.cpp:23:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         else if(rr > w.size()-1){check = false; break;}
      |                 ~~~^~~~~~~~~~~~

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