Submission #146768

#	Time	Username	Problem	Language	Result	Execution time	Memory
146768		youssan_william	Arranging Shoes (IOI19_shoes)	C++14	Compilation error	0 ms	0 KiB

shoes

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
bool v[100005];
ll count_swaps(vector<ll>arr)
{
    ll n = arr.size();
    ll ans=0;
    for(int i = 1 ; i <=2*n ; i++)
    {
        if(!v[abs(arr[i])])
        {
            v[abs(arr[i])]=1;
            for(int j =i+1 ; j <= 2 * n ;j++)
            {
                if(abs(arr[i])==abs(arr[j]))
                {
                    for(int k=j-1 ; k>i ;k--)
                    {
                        swap(arr[k],arr[k+1]);
                        ans++;
                    }
                    break;
                }
            }
        }
    }
    for(int i = 1 ;  i <=2*n ;i++ )
    {
        if(i%2==1&&arr[i]>arr[i+1])
            ans++;
    }
    return ans;
}

Compilation message (stderr)

/tmp/ccXjyocf.o: In function `main':
grader.cpp:(.text.startup+0x272): undefined reference to `count_swaps(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status