Submission #253430

#	Time	Username	Problem	Language	Result	Execution time	Memory
253430		Badrangiikh	Arranging Shoes (IOI19_shoes)	C++14	Compilation error	0 ms	0 KiB

shoes

#include<bits/stdc++.h>
#include <deque> 
#include <cmath>
using namespace std;
 
#define ll long long 
 
/*freopen("input.txt","r",stdin);
freopen("output.txt","w",stdout);*/
 
long long n , i ;
long long shoes [ 200045 ] ;

int main() {
    scanf ( "%lld" , & n ) ;
    for ( i = 0 ; i < 2 * n ; i ++ ) {
        scanf ( "%lld" , & shoes [ i ] ) ;
    }
    printf ( "%lld" , n * ( n - 1 ) / 2 ) ;
}    

Compilation message (stderr)

shoes.cpp: In function 'int main()':
shoes.cpp:15:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf ( "%lld" , & n ) ;
     ~~~~~~^~~~~~~~~~~~~~~~
shoes.cpp:17:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf ( "%lld" , & shoes [ i ] ) ;
         ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/ccruQzV1.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccz7b3cU.o:shoes.cpp:(.text.startup+0x0): first defined here
/tmp/ccruQzV1.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