Function for finding the minimum number changes required in given String
static void minimumOperations ( String S , int m ) { int V = 100 ; @ SuppressWarnings ( " unchecked " ) Vector < Integer > [ ] adj = new Vector [ V ] ; int total = 0 , N = S . length ( ) ; for ( int i = 0 ; i < adj . length ; i ++ ) adj [ i ] = new Vector < Integer > ( ) ;