{"trustable":false,"sections":[{"title":"","value":{"format":"MD","content":"小周每天都在学数学，有一天他忽然对调和级数感兴趣。\n在数学中，第n项调和数是前n个自然数倒数的和:\n\n$$H_n \u003d 1 + \\frac{1}{2} + \\frac{1}{3} + \\frac{1}{4} + \\ldots + \\frac{1}{n}$$\n\n$$\u003d \\sum_{k \u003d 1}^n \\frac{1}{k}$$\n\n小周想要求处第n项调和级数的值。"}},{"title":"Input","value":{"format":"MD","content":"输入以整数T (\u0026#8804; 10000),表示测试用例的数量。\n\n每个样例都包含一行整数 n (1 \u0026#8804; n \u0026#8804; 10\u003csup\u003e8\u003c/sup\u003e).\n"}},{"title":"Output","value":{"format":"MD","content":"输出第n项调和级数的值，误差小于**10\u003csup\u003e-8\u003c/sup\u003e** 就可以被接受。"}},{"title":"Sample","value":{"format":"MD","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e12\n1\n2\n3\n4\n5\n6\n7\n8\n9\n90000000\n99999999\n100000000\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003eCase 1: 1\nCase 2: 1.5\nCase 3: 1.8333333333\nCase 4: 2.0833333333\nCase 5: 2.2833333333\nCase 6: 2.450\nCase 7: 2.5928571429\nCase 8: 2.7178571429\nCase 9: 2.8289682540\nCase 10: 18.8925358988\nCase 11: 18.9978964039\nCase 12: 18.9978964139\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}}]}