Driver code
public static void main ( String args [ ] ) { int mat [ ] [ ] = { { 10 , 20 , 30 , 40 } , { 15 , 25 , 35 , 45 } , { 25 , 29 , 37 , 48 } , { 32 , 33 , 39 , 50 } } ; int res = kthSmallest ( mat , 4 , 7 ) ; System . out . print ( "7th ▁ smallest ▁ element ▁ is ▁ " + res ) ; } }