Var n, m : Integer; Function solve(n, m : Integer) : Integer; Var i, sum : Integer; Begin If m = 1 Then Begin solve := 1; Exit; End; sum := 0; For i := 1 To n - 1 Do sum := sum + solve(i, m - 1); solve := sum; End; Begin Readln(n, m); Writeln(solve(n, m)); End.
输入：7 4
输出：1
