题解:

使用二分查找

class Solution {
public:
    int minArray(vector<int>& numbers) {
        int low = 0;
        int high = numbers.size() - 1;
        while (low < high) {
            int pivot = low + (high - low) / 2;
            if (numbers[pivot] < numbers[high]) {
                high = pivot;
            }
            else if (numbers[pivot] > numbers[high]) {
                low = pivot + 1;
            }
            else {
                high -= 1;
            }
        }
        return numbers[low];
    }
};

题解:

循环+位运算

class Solution {
public:
    int hammingWeight(uint32_t n) {
        int ret = 0;
        while (n) {
            n &= n - 1;
            ret++;
        }
        return ret;
    }
};