recca chao 的 gitHub page

寫一些技術文件,筆記,雜七雜八

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class Solution : SolBase() {
    fun rand7(): Int {
        while(true) {
            val a = rand5()
            val b = rand5()
            val idx = 5 * (a - 1) + b
            if (idx <= 21) {
                return 1 + (idx - 1) % 7;
            }
        }
    }
}