Submission #651355

#	Time	Username	Problem	Language	Result	Execution time	Memory
651355		pauloamed	Detecting Molecules (IOI16_molecules)	C++17	0 / 100	0 ms	212 KiB

molecules

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

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

  vector<pair<int,int>> W;
  for(int i = 0; i < n; ++i){
    W.push_back({w[i], i});
  }
  sort(W.begin(), W.end());

  vector<int> ans;
  for(int i = 0; i < W.size(); ++i){
    int mini = W[i].first;
    int id_mini = W[i].second;

    int maxi = W.back().first;
    int id_maxi = W.back().second;

    if(mini > u) return {};
    else if(mini >= l){
      ans.push_back(id_mini);
      return ans;
    }else{
      // mini ta a esquerda
      // maxi ta dentro ou a esquerda
      if(maxi > u) return {};
      ans.push_back(id_maxi);
      if(maxi >= l){ // maxi ta dentro
        return ans;
      }else{ // maxi ta a esquerda
        l -= maxi;
        u -= maxi;
      }
      W.pop_back();
    }
  }


  if(0 >= l && 0 <= u) return ans;
  else return {};
}

// int32_t main(){
//   auto ret = find_subset(15, 17, {6,8,8,7});
//   for(auto x : ret) cout << x << " ";
//   cout << "\n";

//   ret = find_subset(14, 15, {5, 5, 6, 6});
//   for(auto x : ret) cout << x << " ";
//   cout << "\n";

//   ret = find_subset(10, 20, {15, 17, 16, 18});
//   for(auto x : ret) cout << x << " ";
//   cout << "\n";
// }

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:15:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |   for(int i = 0; i < W.size(); ++i){
      |                  ~~^~~~~~~~~~

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