{"trustable":false,"sections":[{"title":"","value":{"format":"MD","content":"一个天平上有C(2\u003c\u003dC\u003c\u003d20)个挂钩,挂钩所在位置在区间[-15,15]。\n\n你的手里有G(2\u003c\u003dG\u003c\u003d20)个砝码,每个砝码的重量在区间[1,25]。\n\n求天平平衡的方法数。"}},{"title":"Input","value":{"format":"MD","content":"\n第一行有一个C(2\u003c\u003dC\u003c\u003d20)与(2\u003c\u003dG\u003c\u003d20),如上描述。\n\n接下来一行由C个整数,为天平挂钩的位置([-15,15]),正数可以理解为挂钩在天平左边,反之在右边。\n\n接下来一行由G个整数,表示拥有砝码的质量。"}},{"title":"Output","value":{"format":"MD","content":"输出可以使天平平衡的方案数。"}},{"title":"Sample Input","value":{"format":"MD","content":"```\n2 4\n-2 3 \n3 4 5 8\n```"}},{"title":"Sample Output","value":{"format":"MD","content":"```\n2\n```"}}]}