func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     string s1, s2;     cin >> s1 >> s2;     int ans = 0;     int start = 0;     int end = n - 1;     while (s1[start] == s2[start]) start++;     while (s1[end] == s2[end]) end--;     if (s1.substr(start, end - start) == s2.substr(start + 1, end - start)) ans++;     if (s2.substr(start, end - start) == s1.substr(start + 1, end - start)) ans++;     cout << ans << endl;     return 0;   }   