如不如此都如此的博客

Maximum Multiple Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2606    Accepted Submission(s): 1091   Problem Description ...

Chiaki has nn strings s1,s2,…,sns1,s2,…,sn consisting of '(' and ')'. A string of this type is said to be balanced: + if it is the empty string + if AA and BB are balanced, ABAB is balanced, + if A...

Chiaki has 3n3n points p1,p2,…,p3np1,p2,…,p3n. It is guaranteed that no three points are collinear. Chiaki would like to construct nn disjoint triangles where each vertex comes from the 3n3n points. ...

Chiaki has an array of nn positive integers. You are told some facts about the array: for every two elements aiai and ajaj in the subarray al..ral..r (l≤i<j≤rl≤i<j≤r), ai≠ajai≠aj holds. Chiaki ...

Chiaki often participates in international competitive programming contests. The time zone becomes a big problem. Given a time in Beijing time (UTC +8), Chiaki would like to know the time in another ...

Chiaki is interested in an infinite sequence a1,a2,a3,...a1,a2,a3,..., which is defined as follows: an={1an−an−1+an−1−an−2n=1,2n≥3an={1n=1,2an−an−1+an−1−an−2n≥3Chiaki would like to know the sum o...