public static long minPerimeter ( int n ) {
  int l = ( int ) Math . sqrt ( n ) ;
  int sq = l * l ;
  if ( sq == n ) return l * 4 ;
  else {
    long row = n / l ;
    long perimeter = 2 * ( l + row ) ;
    if ( n % l != 0 ) perimeter += 2 ;
    return perimeter ;
  }
}

public static long minPerimeter ( int n ) { int l = ( int ) Math . sqrt ( n ) ; int sq = l * l ; if ( sq == n ) return l * 4 ; else { long row = n / l ; long perimeter = 2 * ( l + row ) ; if ( n % l != 0 ) perimeter += 2 ; return perimeter ; } }
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