func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e5 + 10;   char s[N];   int main() {     scanf( %s , s);     int n = strlen(s);     int x = 0, y = 0;     for (int i = 0; i < n; i++) {       if (s[i] ==  L )         x--;       else if (s[i] ==  R )         x++;       else if (s[i] ==  U )         y++;       else         y--;     }     if ((abs(x) + abs(y)) % 2 == 0)       cout << (abs(x) + abs(y)) / 2 << endl;     else       cout << -1 << endl;   }   