static int minimumflip ( int mat [ ] [ ] , int n ) {
  int flip = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) for ( int j = 0 ;
  j < i ;
  j ++ ) if ( mat [ i ] [ j ] != mat [ j ] [ i ] ) flip ++ ;
  return flip ;
}

static int minimumflip ( int mat [ ] [ ] , int n ) { int flip = 0 ; for ( int i = 0 ; i < n ; i ++ ) for ( int j = 0 ; j < i ; j ++ ) if ( mat [ i ] [ j ] != mat [ j ] [ i ] ) flip ++ ; return flip ; }
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