{"trustable":false,"prependHtml":"","sections":[{"title":"题目描述","value":{"format":"MD","content":"给出n , m，和m个数a[1]⋯a[m]。\n\n求1⋯n中不被a[1]⋯a[m]中任意一个整除的数的个数。\n10⩽n\u003c$ 2^{31} $,1⩽m⩽15"}},{"title":"输入格式","value":{"format":"MD","content":"每组数据以n,m为第一行。\n\n第二行m个数，表示a[i]。\n\n输入文件以EOF结尾。"}},{"title":"输出格式","value":{"format":"MD","content":"每组数据一行一个数字表示答案。"}},{"title":"样例输入","value":{"format":"MD","content":"10 2\n2 3\n20 2\n2 4"}},{"title":"样例输出","value":{"format":"MD","content":"3\n10"}}]}