func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string s;     long n, i, k = 0, u = 0, d = 0, l = 0, r = 0;     cin >> n;     cin >> s;     for (i = 0; i < s.size(); i++) {       if (s[i] ==  U ) u++;       if (s[i] ==  D ) d++;       if (s[i] ==  L ) l++;       if (s[i] ==  R ) r++;     }     k += min(d, u) * 2;     k += min(r, l) * 2;     cout << k;   }   