Submission #151204

#	Time	Username	Problem	Language	Result	Execution time	Memory
151204		outsider	Arranging Shoes (IOI19_shoes)	C++17	Compilation error	0 ms	0 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
#define ll int
#define x first4
#define y second
using namespace std;
ll count_swaps(vector<int> a){
ll ans=0;
ll n=a.size()/2;
a.push_front(0);
for (int i=1;i<=2*n;i++)
{
    ll mt=0;
    for (ll k=i+1;k<=2*n;k++)
    {
        if (a[k]==-a[i])
        {
        ans+=mt;
        if (a[i]>0)ans++;
        a[k]=0;
        break;
        }
        else
        if (a[k]!=0)mt++;
    }
}
return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'int count_swaps(std::vector<int>)':
shoes.cpp:7:4: error: ambiguating new declaration of 'int count_swaps(std::vector<int>)'
 ll count_swaps(vector<int> a){
    ^~~~~~~~~~~
In file included from shoes.cpp:1:0:
shoes.h:7:11: note: old declaration 'long long int count_swaps(std::vector<int>)'
 long long count_swaps(std::vector<int> S);
           ^~~~~~~~~~~
shoes.cpp:10:3: error: 'class std::vector<int>' has no member named 'push_front'; did you mean 'push_back'?
 a.push_front(0);
   ^~~~~~~~~~
   push_back