Submission #297842

#	Time	Username	Problem	Language	Result	Execution time	Memory
297842		Muhammetali	Detecting Molecules (IOI16_molecules)	C++11	0 / 100	0 ms	256 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
#define mp make_pair
#define f first
#define s second
#define sz(x) (int)(x).size()
#define rsz resize
#define ins insert
#define ft front()
#define bk back()
#define pf push_front
#define pb push_back
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pi;
typedef pair<ll,ll> pl;
typedef vector<int> vi;
typedef vector<bool> vb;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
vi find_subset(int l, int u, vi w)
{
	int n=sz(w);
	int jem;
	vpl par;
	for (int i=0;i<n;i++)par.pb({w[i],i});
	for (int i=0;i<n-1;i++)
	{
		for (int j=i;j<n-1;j++)
		{
			if (par[j].f>par[j+1].f)
			{
				swap(par[j],par[j+1]);
			}
		}
	}
	vi res;
	int q1=0,q2=n-1;
	while(1)
	{
		if (jem+par[q2].f>u)break;
		jem+=par[q2].f;
		res.pb(par[q2].s);
		q2--;
	}
	while(1)
	{
		if (jem+par[q1].f>u)break;
		jem+=par[q1].f;
		res.pb(par[q1].s);
		q1++;
	}
	if (jem>=l)return res;
	res.clear();
	jem=0,q1=n-1,q2=0;
	while(1)
	{
		if (jem+par[q2].f>u)break;
		jem+=par[q2].f;
		res.pb(par[q2].s);
		q2++;
	}
	while(1)
	{
		if (jem+par[q1].f>u)break;
		jem+=par[q1].f;
		res.pb(par[q1].s);
		q1--;
	}
	if (jem>=l)return res;
	res.clear();
	return res;
}

Compilation message (stderr)

molecules.cpp: In function 'vi find_subset(int, int, vi)':
molecules.cpp:46:7: warning: 'jem' may be used uninitialized in this function [-Wmaybe-uninitialized]
   46 |   if (jem+par[q2].f>u)break;
      |       ^~~

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