Submission #894167

#	Time	Username	Problem	Language	Result	Execution time	Memory
894167		ozner77	Arranging Shoes (IOI19_shoes)	C++17	Compilation error	0 ms	0 KiB

shoes

#include <iostream>
#include <vector>
using namespace std;
int a,b;
vector<int> V;
int main()
{
    cin>>a;
    for(int i=0;i<a*2;i++){
        cin>>b;
        V.push_back(b);
    }
    if(V[0]<0){
        printf("%d",0);
    }else{
        printf("%d",1);
    }
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccaWGln3.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc6Fxyk3.o:shoes.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccaWGln3.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