Counting freq of each element
if ( mp . containsKey ( arr [ i ] ) ) { mp . put ( arr [ i ] , mp . get ( arr [ i ] ) + 1 ) ; } else { mp . put ( arr [ i ] , 1 ) ; } } int ans = 0 ; for ( Map . Entry < Integer , Integer > x : mp . entrySet ( ) ) { int value = x . getKey ( ) ; int freq = x . getValue ( ) ;