This a simple program that outputs the result of possibility to construct a triangle with the given 3 positive real numbers x, y, z, as a side lengths of the triangle. -This is a simple program that outputs the result of possibility to construct a

如果某个整数x（x> 1）存在一个数组中，则2*x+1和3*x+1也必定在这个数组中，已知1为该数组中的元素，现给定一个整数k（k> 1），要求求出该数组中的第k大的数。例如a[3] {1,2,3}，当k 1，则返回3；k 2，则返回2；k 3，则返回1；k> 4或k<1，输出错误。-If an integer x (x> 1) exists in an array, then 2* x+ 1 and 3* x+ 1 must also be in this a