#include <bits/stdc++.h>   using namespace std;   int main() {     int n;     scanf( %d , &n);     char str[105];     scanf( %s , str);     int l = 0, r = 0, u = 0, d = 0;     for (int i = 0; i < n; i++)       if (str[i] ==  L )         l++;       else if (str[i] ==  R )         r++;       else if (str[i] ==  U )         u++;       else if (str[i] ==  D )         d++;     printf( %d n , min(l, r) * 2 + min(u, d) * 2);   }   