View Code of Problem 4062

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