include [HTML_REMOVED]

include [HTML_REMOVED]

include [HTML_REMOVED]

using namespace std;
char a[101],b[101];
int lena;
double k,s;
int main()
{
cin >> k >> a >> b;
for (int i = 0; a[i]; i ){
if(a[i] == b[i]) s;
}
lena = strlen(a);
if(s/lena >= k) cout << “yes”;
else cout << “no”;
return 0;
}