Function to print the sum of maximum two elements from the array
int maxPairSum ( vector < int > & arr ) { int n = arr . size ( ) ; int max , secondMax ; if ( arr [ 0 ] > arr [ 1 ] ) { max = arr [ 0 ] ; secondMax = arr [ 1 ] ; } else { max = arr [ 1 ] ; secondMax = arr [ 0 ] ; } for ( int i = 2 ; i < n ; i ++ ) { if ( arr [ i ] > max ) { secondMax = max ; max = arr [ i ] ; } else if ( arr [ i ] > secondMax ) { secondMax = arr [ i ] ; } } return ( max + secondMax ) ; }