problem

​​1365. How Many Numbers Are Smaller Than the Current Number​​

理解清楚题意，以及计算过程；

solution1: two vector;

code

solution2: one vector;

code

注意

1. 累加和的计算公式；

2. 求和与所求之间的关系；

3. 所求结果首元素的确定；

参考

1. ​​leetcode_1365. How Many Numbers Are Smaller Than the Current Number​​;

完