Submission #146764

#	Time	Username	Problem	Language	Result	Execution time	Memory
146764		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[1000000000];
int main()
{
    ll n;
    cin>>n;
    ll arr[2*n+1];
    for(int i = 1 ; i <= 2*n ; i++)
    {
        cin >> arr[i];
    }
    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++;
    }
    cout << ans;
    return 0;
}

Compilation message (stderr)

/tmp/ccRWDBPR.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/cc7fkizi.o:shoes.cpp:(.text.startup+0x0): first defined here
/tmp/ccRWDBPR.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