# include<iostream> # include<vector> # include<math.h> # include<algorithm> # include<string> using namespace std; int main() { int n; cin>>n; while(n--){ string str1, str2; cin>>str1; cin>>str2; int k; cin>>k; int ret = 0, len = str1.size(); for(int i = 0; i < len; i++){ if(str1[i] != str2[i]) ret++; } if(ret%2==1) cout<<"NO"<<endl; else if(ret/2 > k) cout<<"NO"<<endl; else cout<<"YES"<<endl; } return 0; } |
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