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“玲珑杯”线上赛Round#17河南专场 A. Sin your life
题解sin(x)+sin(y)=2⋅sin(x+y2)⋅con(x−y2) sin(x)+sin(y)=2·sin(x+y2)·con(x−y2) sin(x)+sin(y)+sin(z)=2⋅sin(x+y2)⋅con(x−y2)+sin(n−x−y)sin(x)+sin(y)+sin(z)=2·sin(x+y2)·con(x−y2)+sin(n−x−y)直接枚举x+原创 2017-06-27 17:55:04 · 530 阅读 · 0 评论 -
HDU 5448 Marisa’s Cake(n个点中任意点组成的多边形面积之和）
Marisa’s CakeTime Limit: 3000/2000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 263 Accepted Submission(s): 151Problem DescriptionToday is Mar原创 2017-06-30 17:04:38 · 411 阅读 · 0 评论 -
2017杭电多校第七场1005 Euler theorem（勉强数论）HDU 6124
Euler theoremTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 524288/524288 K (Java/Others)Total Submission(s): 518 Accepted Submission(s): 415Problem DescriptionHazelFan is give原创 2017-08-16 20:55:18 · 429 阅读 · 0 评论 -
2017杭电多校第七场1010 Just do it（数论，杨辉三角）HDU 6129
Just do itTime Limit: 5000/2500 MS (Java/Others) Memory Limit: 524288/524288 K (Java/Others)Total Submission(s): 1047 Accepted Submission(s): 606Problem DescriptionThere is a nonnega原创 2017-08-16 21:36:50 · 509 阅读 · 0 评论 -
2017杭电多校联赛 1001 Add More Zero（取对数）HDU 6033
Add More ZeroTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 0 Accepted Submission(s): 0Problem DescriptionThere is a young原创 2017-07-25 17:35:23 · 727 阅读 · 0 评论 -
2017杭电多校第四场1003 Counting Divisors (分解质因数） hdu 6069
Counting DivisorsTime Limit: 10000/5000 MS (Java/Others) Memory Limit: 524288/524288 K (Java/Others)Total Submission(s): 1374 Accepted Submission(s): 495Problem DescriptionIn mat原创 2017-08-04 09:58:53 · 589 阅读 · 0 评论 -
2017 杭电多校联赛第二场 1009 TrickGCD（容斥原理） HDU 6053
TrickGCDTime Limit: 5000/2500 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 875 Accepted Submission(s): 343Problem DescriptionYou are given an原创 2017-07-28 10:34:21 · 476 阅读 · 0 评论 -
HDU6108 小C的倍数问题
小C的倍数问题Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 618 Accepted Submission(s): 363Problem Description根据小学数学的知识，我们知道一个正整数x是3的倍原创 2017-08-14 15:05:02 · 357 阅读 · 0 评论