Permutation Cycle

2000ms

262144K

Description:

For a permutation P[1... N] of integers from 1 to N, function f is defined as follows:

$\text{[math]}$

Let g(i) be the minimum positive integer j such that f(i, j) = i. We can show such j always exists.

For given N, A, B, find a permutation P of integers from 1 to N such that for 1 ≤ i ≤ N, g(i) equals either A or B.

The only line contains three integers N, A, B (1 ≤ N ≤ 10⁶, 1 ≤ A, B ≤ N).

If no such permutation exists, output -1. Otherwise, output a permutation of integers from 1 to N.

9 2 5

6 5 8 3 4 1 9 2 7

3 2 1

1 2 3

In the first example, g(1) = g(6) = g(7) = g(9) = 2 and g(2) = g(3) = g(4) = g(5) = g(8) = 5

In the second example, g(1) = g(2) = g(3) = 1

Informação

Provedor Codeforces

Código CF932C