Submission #434218

#	Time	Username	Problem	Language	Result	Execution time	Memory
434218		Supersonic	Detecting Molecules (IOI16_molecules)	C++14	69 / 100	55 ms	9876 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
using namespace std;
std::vector<int> find_subset(int l, int u, std::vector<int> w) {
    int n=w.size();vector<pair<int,int>> s;vector<int> r;
    for(int i=0;i<n;i++)s.push_back({w[i],i});
    sort(s.begin(),s.end());
    vector<pair<int,int>> mi,ma;mi.push_back(s[0]);ma.push_back(s.back());
    int as=mi[0].first,bs=ma[0].first;
    for(int i=0;i<n;i++){
      if(i>0){mi.push_back(s[i]);ma.push_back(s[n-1-i]);
      //for(auto j:mi)cerr<<j.first<<' ';cerr<<endl;for(auto j:ma)cerr<<j.first<<' ';cerr<<endl;cerr<<endl;
      as+=mi[i].first,bs+=ma[i].first;}
      if(as<=l&&bs>=l){
        //for(auto j:mi)cerr<<j.first<<' ';cerr<<endl;for(auto j:ma)cerr<<j.first<<' ';cerr<<endl;
        for(int j=0;j<=i+1;j++){
          if(as>=l&&as<=u)break;
          if(j==i+1)exit(1);
          as-=mi[j].first;mi[j]=ma[j];as+=mi[j].first;
        }
        for(auto i:mi)r.push_back(i.second);
        return r;
      }
      if(as>=l&&as<=u){
        for(auto i:mi)r.push_back(i.second);
        return r;
      }
      if(as>u)break;
    }
    return r;
}

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