Submission #160605

#	Time	Username	Problem	Language	Result	Execution time	Memory
160605		nafis_shifat	Detecting Molecules (IOI16_molecules)	C++14	100 / 100	95 ms	6252 KiB

molecules

#include "molecules.h"
#include<bits/stdc++.h>
#define pii pair<int,int>
#define ll long long
using namespace std;
vector<int> find_subset(int l, int u, vector<int> w)
{
	vector<pii> v;
	for(int i=0;i<w.size();i++)v.emplace_back(w[i],i);
	sort(v.begin(),v.end());
    
    vector<int> res;
    int _r=-1;
    for(int i=0;i<v.size();i++)
    {
    	if(v[i].first<=u&&v[i].first>=l)
    	{
    		res.push_back(v[i].second);
    		return res;
    	}
    	if(v[i].first<l)_r=i;
    }

    ll cs=0;
    int _l=-1;
    for(int i=_r;i>=0;i--)
    {
    	cs+=v[i].first;
    	if(cs>=l&&cs<=u)
    	{
    		_l=i;
    		break;
    	}
    	if(cs>u)
    	{
    		cs-=v[_r].first;
    		_r--;
    		if(cs>=l&&cs<=u)
    		{
    			_l=i;
    			break;
    		}
    	}
    }

    if(_l==-1)
    {
    	return res;
    }

    for(int i=_l;i<=_r;i++)res.push_back(v[i].second);
    sort(res.begin(),res.end());
    return res;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:9:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<w.size();i++)v.emplace_back(w[i],i);
              ~^~~~~~~~~
molecules.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<v.size();i++)
                 ~^~~~~~~~~

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