Submission #879924

#	Time	Username	Problem	Language	Result	Execution time	Memory
879924		grafff	Arranging Shoes (IOI19_shoes)	C++17	Compilation error	0 ms	0 KiB

shoes

#include <bits/stdc++.h>
#define ll long long

using namespace std;

ll n;

bool gr3(vector <ll> s)
{
    ll k = abs(s[0]);
    for(int i = 2; i < n * 2; i++)
    {
        if(abs(s[i]) != k)
        {
            return false;
        }
    }
    return true;
}

ll f3(vector <ll> s)
{
    ll k = 0;
    for(int i = 0; i < n; i++)
    {
        if(s[i * 2] > 0)
        {
            k++;
        }
    }
    return k;
}

ll count_swaps(vector <ll> s)
{
    n = s.size() % 2;
    if(n == 1)
    {
        if(s[0] < 0)
        {
            return 0;
        }
        else
        {
            return 1;
        }
    }
    if(gr3(s))
    {
        return f3(s);
    }
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<long long int>)':
shoes.cpp:52:1: warning: control reaches end of non-void function [-Wreturn-type]
   52 | }
      | ^
/usr/bin/ld: /tmp/cc4BKSHZ.o: in function `main':
grader.cpp:(.text.startup+0x2a8): undefined reference to `count_swaps(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status