Submission #487001

#	Time	Username	Problem	Language	Result	Execution time	Memory
487001		ssense	Arranging Shoes (IOI19_shoes)	C++14	Compilation error	0 ms	0 KiB

shoes

#include <bits/stdc++.h>
//#include "shoes.h"
#define startt ios_base::sync_with_stdio(false);cin.tie(0);
typedef long long  ll;
using namespace std;
#define vint vector<int>
#define all(v) v.begin(), v.end()
#define MOD 1000000007
#define MOD2 998244353
#define MX 1000000000
#define MXL 1000000000000000000
#define PI (ld)2*acos(0.0)
#define nax 200005
#define pb push_back
#define sc second
#define fr first
//#define int long long
#define endl '\n'
#define ld long double
#define NO cout << "NO" << endl
#define YES cout << "YES" << endl

long long count_swaps(vector<int> s)
{
	ll n = s.size()/2;
	if(n > 1000)
	{
		return n*(n-1)/2;
	}
	int ans = 0;
	while(s.size() > 0)
	{
		int i = 0;
		while(s[i] > 0)
		{
			i++;
		}
		ans+=i;
		int sz = -s[i];
		s.erase(s.begin()+i);
		i = 0;
		while(s[i] != sz)
		{
			i++;
		}
		ans+=i;
		s.erase(s.begin()+i);
	}
	return ans;
}

int main()
{
	int n;
	cin >> n;
	vint a(2*n);
	for(int i = 0; i < 2*n; i++)
	{
		cin >> a[i];
	}
	cout << count_swaps(a);
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccwkppzp.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccnO6b2q.o:shoes.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status