Submission #253456

#	Time	Username	Problem	Language	Result	Execution time	Memory
253456		Badrangiikh	Arranging Shoes (IOI19_shoes)	C++14	45 / 100	29 ms	3320 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);*/
 
int 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 ;
    }
    n = s . size ( ) / 2 ;
    return ( n - 1 ) * n / 2 ;
}    

• Subtask 1: 10 / 10
• Subtask 2: 0 / 20
• Subtask 3: 20 / 20
• Subtask 4: 15 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 15