Submission #90105

#	Time	Username	Problem	Language	Result	Execution time	Memory
90105		YottaByte	Beautiful row (IZhO12_beauty)	C++14	0 / 100	2 ms	256 KiB

beauty

#include <bits/stdc++.h>
using namespace std;

const int N = 20;
int a[N + 1], n, ans, c2[N + 1], c3[N + 1];

inline int count(int a)
{
	int res = 0;
	while(a)
	{
		res += (a % 3 == 1);
		a /= 3;
	}
	return res;
}

main()
{
	cin >> n;
	for(int i = 1; i <= n; i++)
	{
		cin >> a[i];
		c2[i] = __builtin_popcount(a[i]);
		c3[i] = count(a[i]);
	}
	
	for(int i = 1; i < n; i++)
	{
		for(int j = i + 1; j <= n; j++)
			if(c3[i] == c3[j]) ans++;
	}
	
	for(int i = 1; i < n; i++)
	{
		for(int j = i + 1; j <= n; j++)
			if(c2[i] == c2[j]) ans++;
	}
	
	cout << ans << endl;
}

Compilation message (stderr)

beauty.cpp:18:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^

• Subtask 1: 0 / 100