Function to find the final direction
static String findDirection ( String s ) { int count = 0 ; String d = " " ; for ( int i = 0 ; i < s . length ( ) ; i ++ ) { if ( s . charAt ( 0 ) == 'NEW_LINE') return null ; if ( s . charAt ( i ) == ' L ' ) count -- ; else { if ( s . charAt ( i ) == ' R ' ) count ++ ; } }