给定一个数组，一个整型数值你n，判断此数组是否满足：数组中有两个数和为n，对应的下标和也为n，例如，a[2]+a[3] = 5.2+3=5,返回1，否则返回0。-Given an array, an integer n, you determine whether this array meet: have two Numbers in the array and for n, corresponding subscr ipt and also for n, for example, a+ a