参考代码

Dim rs As Integer = 5
Dim cs As Integer = 2
Dim dic_r As new Dictionary(of String, Integer)
Dim dic_b As new Dictionary(of String, Boolean)
For i As Integer = 1 To rs
    dic_r.add(i, 0)
    For j As Integer = i+1 To rs
        dic_b.add(i & "," & j, False)
    Next
Next

Do While True
    Dim min As Integer = 999
    Dim dic_bx As new Dictionary(of String, Integer)
    Dim ls_bx As new List(Of String)
    Dim arykey() As String = Nothing
    For Each key As String In dic_b.keys
        If dic_b(key) = False Then
            Dim ary As String() = key.split(",")
            Dim s As Integer = dic_r(ary(0)) + dic_r(ary(1))
            If s <= min Then
                min = s
                arykey = ary
            End If
        End If
    Next
    If arykey Is Nothing Then
        Exit Do
    Else
        dic_r(arykey(0)) += 1 \'场次+1
        dic_r(arykey(1)) += 1
        dic_b(arykey(0) & "," & arykey(1)) = True \'把此场设置为比赛
        output.show(arykey(0) & "," & arykey(1) & "(" & dic_r(arykey(0)) & " : " & dic_r(arykey(1)) & ")")
    End If
Loop