func_code_string: #include <bits/stdc++.h>   int main() {     int len, i, l = 0, r = 0, u = 0, d = 0, dif1, dif2;     scanf( %d , &len);     char str[101];     scanf(  %s , str);     for (i = 0; i < len; i++) {       if (str[i] ==  L )         l++;       else if (str[i] ==  R )         r++;       else if (str[i] ==  U )         u++;       else if (str[i] ==  D )         d++;     }     dif1 = l - r;     if (dif1 < 0) dif1 = -dif1;     dif2 = u - d;     if (dif2 < 0) dif2 = -dif2;     printf( %d n , (len - (dif1 + dif2)));     return 0;   }   