存题（堆的应用与堆排序）

有点麻烦，有些知识点是盲点，留着明天学

题目：

https://pintia.cn/problem-sets/994805342720868352/exam/problems/994805377432928256

https://pintia.cn/problem-sets/994805342720868352/exam/problems/994805368847187968

https://pintia.cn/problem-sets/994805342720868352/exam/problems/1071785408849047552

https://pintia.cn/problem-sets/994805342720868352/exam/problems/994805342821531648

复习资料：

https://blog.csdn.net/Mic_Mickey/article/details/114389568（转载）