leetcode-go/leetcode/medium/470.implement-rand10-using-rand7.go

func rand10slow() int {
	for {
		if r49 := 7*(rand7()-1) + rand7(); r49 <= 40 {
			return r49%10 + 1
		}
	}
}

func rand10() int {
	for {
		if r343 := 49*(rand7()-1) + 7*(rand7()-1) + rand7(); r343 <= 340 {
			return r343%10 + 1
		}
	}
}