{"trustable":false,"sections":[{"title":"题意","value":{"format":"PLAIN","content":"求没有重复数字的最长区间.\n输入:第一个数t,代表t组数据,每组第一个数n(0\u003cn\u003c\u003d1e6), 接下来n个数字\n输出:最长的没有重复数字的长度。"}},{"title":"样例输入","value":{"format":"PLAIN","content":"1\n5\n1\n2\n3\n2\n1\n"}},{"title":"样例输出","value":{"format":"PLAIN","content":"3"}}]}