View Code of Problem 4062

#include<iostream>
using namespace std;
int main()
{
	int t;
	cin >> t;
	while(t --)
	{
		string s1, s2;
		int n;
		cin >> s1 >> s2 >> n;
		int k = 0;
		for(int i = 0;i < s1.size();i ++)
		{
			if(s1[i] != s2[i]) k ++;
		}
		if(k % 2 == 0 && k/2 < n) 
		{
			cout << "YES" << endl;
		}
		else cout << "NO" << endl;
	}
	return 0;
}