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  1. type InfiniteInt =
  2.     | Real of int
  3.     | Infinity
  4.     with
  5.         member this.toString = 
  6.             match this with
  7.             | Real(n) -> n.ToString()
  8.             | Infinity -> "Infinity"
  9.  
  10. let inline (+) (x : InfiniteInt) (y : InfiniteInt) = 
  11.     match (x, y) with
  12.     | (Infinity, _) -> Infinity
  13.     | (_, Infinity) -> Infinity
  14.     | (Real(n), Real(m)) -> Real(n + m)
  15.  
  16. let inline (>) (x : InfiniteInt) (y : InfiniteInt) = 
  17.     match (x, y) with
  18.     | (Infinity, Real(_)) -> true
  19.     | (Infinity, Infinity) -> false
  20.     | (Real(_), Infinity) -> false
  21.     | (Real(n), Real(m)) -> n > m
  22.  
  23. let split (c : char) (n : System.String) = n.Split(c)
  24.  
  25. [<EntryPoint>]
  26. let main argv = 
  27.     let vertexes = int (System.Console.ReadLine())
  28.     let adjMatrix = Array2D.init<InfiniteInt> vertexes vertexes (fun _ __ -> Infinity)
  29.     for x in [0..(vertexes - 1)] do
  30.         adjMatrix.[x, x] <- Real(0)
  31.         let line = System.Console.ReadLine() |> split ' '
  32.         for y in [0 .. (Array.length line) - 1] do if line.[y] = "1" then adjMatrix.[x,y] <- Real(1) 
  33.     for x in [0..(vertexes - 1)] do
  34.         for y in [0..(vertexes - 1)] do
  35.             for z in [0..(vertexes - 1)] do
  36.                 let sum = adjMatrix.[y,x] + adjMatrix.[x, z]
  37.                 if adjMatrix.[y, z] > sum then adjMatrix.[y, z] <- sum
  38.     let radius =
  39.         let maxRadiuses = 
  40.             [for x in [0..(vertexes - 1)] 
  41.                 ->
  42.                     [for y in [0..(vertexes - 1)] -> adjMatrix.[x, y]] |> List.max
  43.             ]
  44.         maxRadiuses |> List.min
  45.     printfn "%s" radius.toString
  46.     0
Success #stdin #stdout 0.15s 12160KB
comments (?)
stdin 
10
0 1 0 0 1 1 0 0 0 0
1 0 1 0 0 0 1 0 0 0
0 1 0 1 0 0 0 1 0 0
0 0 1 0 1 0 0 0 1 0
1 0 0 1 0 0 0 0 0 1
1 0 0 0 0 0 0 1 1 0
0 1 0 0 0 0 0 0 1 1
0 0 1 0 0 1 0 0 0 1
0 0 0 1 0 1 1 0 0 0
0 0 0 0 1 0 1 1 0 0
stdout 
2
https://ideone.com/wEayvp
language:
F# (mono 4.1)
created:
11 years ago
visibility:
public

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