Merkkijonot

input/code.cpp: In function 'int main()':
input/code.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (int k = 0; k < strlen(v[i]); k++)
                    ~~^~~~~~~~~~~~~~
input/code.cpp:31:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int l = k + 1; l < strlen(v[i]); l++)
                         ~~^~~~~~~~~~~~~~
input/code.cpp:12:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%50s", v[i]);
   ~~~~~^~~~~~~~~~~~~~

#include<iostream>
#include<string.h>

int main()
{
	int n;
	std::cin >> n;

	char v[100000][50];
	for (int i = 0; i < n; i++)
	{
		scanf("%50s", v[i]);
	}

	int count = 0;
	bool b;

	for (int i = 0; i < n; i++)
	{
		for (int j = i+1; j < n; j++)
		{
			b = true;

			if (strlen(v[i]) != strlen(v[j]))
			{
				break;
			}

			for (int k = 0; k < strlen(v[i]); k++)
			{
				for (int l = k + 1; l < strlen(v[i]); l++)
				{
					if ((v[i][k] == v[i][l]) != (v[j][k] == v[j][l]))
					{
						b = false;
						break;
					}
				}
				if (!b)
				{
					break;
				}
			}

			count++;
		}
	}

	std::cout << count;

	return 0;
}