Submission #253516

#	Time	Username	Problem	Language	Result	Execution time	Memory
253516		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 m , s1 , s2 , y ;

long long count_swaps ( vector < int > s ) {
    long long n = s . size ( ) ;
    if ( n == 2 ) {
        if ( s [ 0 ] < s [ 1 ] ) return 0 ;
        else return 1 ;
    }
    long long x = 0 ;
    for ( long long i = 1 ; i < n ; i ++ ) {
        if ( abs ( s [ i ] ) == abs ( s [ 0 ] ) ) x ++ ;
    }
    if ( x + 1 == n ) {
        long long y = 0 ;
        long long z = 0 ;
        for ( long long i = 0 ; i < n ; i ++ ) {
            if ( s [ i ] < 0 ) {
                z += abs ( i - y ) ;
                y += 2 ;
            } 
        }
        return z ;
    }
    x = 0 ;
  	y = 0 ;
  	n = s . size ( ) / 2 ;
  	m = s . size ( ) ;
    for ( int l = 1 ; l <= n ; l ++ ) {
      	for ( int i = 0 ; i < m ; i ++ ) {
          	if ( s [ i ] < 0 ) {
              	for ( int j = 0 ; j < m ; j ++ ) {
                	if ( s [ j ] == ( -1 ) * s [ i ] ) {
                      	s1 = i ;
                      	s2 = j ;
                      	break ;
                    }
              	}
              	break ;
            }
        }
      	if ( s1 < s2 ) {
          	x += ( s1 + s2 - 1 ) ;
        }
      	else {
          	x += ( s1 + s2 ) ;
        }
      	y = 0 ;
      	for ( i = 0 ; i < m ; i ++ ) {
          	if ( i == s1 || i == s2 ) continue ;
          	s [ y ] = s [ i ] ;
        }	
      	m -= 2 ;
    }
    return x ;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:58:14: error: 'i' was not declared in this scope
        for ( i = 0 ; i < m ; i ++ ) {
              ^