text: Move the smaller of two values ( downVal and rightVal ) to mat [ i ] [ j ] and recur for smaller value
code: if ( downVal < rightVal ) { mat [ i , j ] = downVal ; mat [ i + 1 , j ] = INF ; youngify ( mat , i + 1 , j ) ; } else { mat [ i , j ] = rightVal ; mat [ i , j + 1 ] = INF ; youngify ( mat , i , j + 1 ) ; } }