Submission #138328

#	Time	Username	Problem	Language	Result	Execution time	Memory
138328		arthurconmy	Detecting Molecules (IOI16_molecules)	C++14	9 / 100	3 ms	376 KiB

molecules

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

vector<int> find_subset(int l, int r, vector<int> W_raw) 
{
	int n = W_raw.size();

    vector<pair<int,int>> W;

    for(int i=0; i<W_raw.size(); i++)
    {
    	W.push_back(make_pair(W_raw[i],i));
    }

    sort(W.begin(),W.end());

    int cur1=0;
    int cur2=0;
    vector<int> v1;
    vector<int> v2;
    bool works=0;

    for(int i=1; i<=n; i++)
    {
    	cur1 += W[i-1].first;
    	v1.push_back(i-1);
    	cur2 += W[n-i].first;
    	v2.push_back(n-i);

    	if(cur1 >= l && cur1 <= r)
    	{
    		// return cur1 things
    		return v1;
    	}

    	if(cur2 >= l && cur2 <= r)
    	{
    		return v2;
    	}

    	if(cur1 < l && cur2 > r)
    	{
    		works=1;
    		break;
    	}
    }

    if(!works) return {};

    for(int i=0; i<v1.size(); i++)
    {
    	cur2 -= W_raw[v2[i]];
    	cur2 += W_raw[v1[v1.size()-i-1]];

    	v2[i]=v1[v1.size()-i-1];

    	if(cur2 <= r) return v2;
    }
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:13:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<W_raw.size(); i++)
                  ~^~~~~~~~~~~~~
molecules.cpp:53:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<v1.size(); i++)
                  ~^~~~~~~~~~
molecules.cpp:62:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

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