题目：http://www.nowcoder.com/practice/9f3231a991af4f55b95579b44b7a01ba

C++

1 class Solution { 2 public: 3     int minNumberInRotateArray(vector
     
       arr) { 4         int len = arr.size(); 5         if (len == 0) return 0; 6         int ret = arr[0]; 7         for (int i = 1; i < len; i++) { 8             if (arr[i] < ret) return arr[i]; 9         }10         return ret;11     }12 };