Power of Four
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这个不错,红红火火恍恍惚惚哼哼哈嘿
public class Solution { public boolean isPowerOfFour(int num) { int count1 = 0; int count0 = 0; while (num > 0) { count1 += num & 1; count0 += num ^ 1; num >>= 1; } if (count1 == 1 && count0 % 2 == 0) { return true; } else { return false; } }}
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