static void sortDiagonal ( int a [ ] [ ] , int M , int N ) {
  for ( int i = 0 ;
  i < M ;
  i ++ ) {
    int sm = a [ i ] [ i ] ;
    int pos = i ;
    for ( int j = i + 1 ;
    j < N ;
    j ++ ) {
      if ( sm > a [ j ] [ j ] ) {
        sm = a [ j ] [ j ] ;
        pos = j ;
      }
    }
    swap ( a , i , i , pos , pos ) ;
  }
  for ( int i = 0 ;
  i < M ;
  i ++ ) {
    for ( int j = 0 ;
    j < N ;
    j ++ ) System . out . print ( a [ i ] [ j ] + " " ) ;
    System . out . println ( ) ;
  }
}

static void sortDiagonal ( int a [ ] [ ] , int M , int N ) { for ( int i = 0 ; i < M ; i ++ ) { int sm = a [ i ] [ i ] ; int pos = i ; for ( int j = i + 1 ; j < N ; j ++ ) { if ( sm > a [ j ] [ j ] ) { sm = a [ j ] [ j ] ; pos = j ; } } swap ( a , i , i , pos , pos ) ; } for ( int i = 0 ; i < M ; i ++ ) { for ( int j = 0 ; j < N ; j ++ ) System . out . print ( a [ i ] [ j ] + " ▁ " ) ; System . out . println ( ) ; } }
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