Function to update and print the matrix after performing queries
static void updateMatrix ( int n , int [ , ] q , int [ , ] mat ) { int i , j ; for ( i = 0 ; i < q . GetLength ( 0 ) ; i ++ ) { int X1 = q [ i , 0 ] ; int Y1 = q [ i , 1 ] ; int X2 = q [ i , 2 ] ; int Y2 = q [ i , 3 ] ;