text: Function to find the final direction
code: string findDirection ( string s ) { int count = 0 ; string d = " " ; for ( int i = 0 ; i < s . length ( ) ; i ++ ) { if ( s [ 0 ] == ' ' ) return NULL ; if ( s [ i ] == ' L ' ) count -- ; else { if ( s [ i ] == ' R ' ) count ++ ; } }