func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve(string a, string b, int m, int n) {     int lcs[m + 1][n + 1];     int result = 0;     for (int i = 0; i <= m; i++) {       for (int j = 0; j <= n; j++) {         if (i == 0 || j == 0)           lcs[i][j] = 0;         else if (a[i - 1] == b[j - 1]) {           lcs[i][j] = lcs[i - 1][j - 1] + 1;           result = max(result, lcs[i][j]);         } else           lcs[i][j] = 0;       }     }     int answer = m + n - 2 * result;     cout << answer <<   n ;   }   int main() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     cin.exceptions(ios::badbit | ios::failbit);     int t = 1;     cin >> t;     while (t--) {       int n;       cin >> n;       string s, temp;       cin >> s;       temp = s;       sort(s.begin(), s.end());       int count = 0;       for (int i = 0; i < n; i++) {         if (temp[i] != s[i]) count++;       }       cout << count <<   n ;     }     return 0;   }   