func shuffleInts(nums []int) (snums []int) {
rand.Seed(time.Now().UTC().UnixNano())
snums = append(snums, nums...)
aliceRng:=rand.New(rand.NewSource(time.Now().Unix()))
aliceRng.Shuffle(len(snums),func(i, j int) {
snums[i], snums[j] = snums[j], snums[i]
})
return
}
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