If a unique combination is found
if ( sum == K ) { cout << " { " ; for ( int i = 0 ; i < local . size ( ) ; i ++ ) { if ( i != 0 ) cout << " ▁ " ; cout << local [ i ] ; if ( i != local . size ( ) - 1 ) cout << " , ▁ " ; } cout << " } " << endl ; return ; }