Submission #439937

#	Time	Username	Problem	Language	Result	Execution time	Memory
439937		QuantumK9	Arranging Shoes (IOI19_shoes)	C++17	25 / 100	25 ms	1868 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>

using namespace std;

#define ll long long

long long count_swaps(vector<int> s) {
	ll n = s.size()/2;

	if ( n == 1 ){
		if ( s[0] < 0 ){ return 0; }
		else{ return 1; }
	}
	else{
		ll ans = ( ((n-1)*n)/2 );
		return ans;
	}
}

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