从i节点由上到下开始调整，i节点的子节点为2 i + 1, 2 i + 2 i节点要向下移动，直到满足i节点小于两个子节点 @param nums nums[] 数组 @param i i节点
(int [] nums, int i,int n)
source not stored for this graph (policy: none)
no outgoing calls
no test coverage detected