雲泥有別 尘亦生辉

Yukari's Birthday Time Limit: 12000/6000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 5676    Accepted Submission(s): 1370 Problem Description Today i

Monkeys Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 153428/153428 K (Java/Others) Total Submission(s): 717    Accepted Submission(s): 232 Problem Description There is a tree ha

Network of Schools Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 19362   Accepted: 7616 Description A number of schools are connected to a computer netwo

Number String Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2033    Accepted Submission(s): 988 Problem Description The signatur

In mathematics, the function d(n) denotes the number of divisors of positive integer n. For example, d(12)=6 because 1,2,3,4,6,12 are all 12's divisors. In this problem, given l,r and k, your task is to calculate the following thing : (∑i=lrd(ik))mod998

Coins Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 15971    Accepted Submission(s): 6340 Problem Description Whuacmers use coins

Brackets Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 8027   Accepted: 4264 Description We give the following inductive definition of a “regular brack

Prime Distance Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 18909   Accepted: 5064 Description The branch of mathematics called number theory is about p

The Last Puzzle Time Limit: 2 Seconds      Memory Limit: 65536 KB      Special Judge  There is one last gate between the hero and the dragon. But opening the gate isn't an easy task. There

Buy Tickets Time Limit: 4000MS   Memory Limit: 65536K Total Submissions: 20782   Accepted: 10237 Description Railway tickets were difficult to buy around the Lunar New

Collision Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1071    Accepted Submission(s): 402 Special Judge Problem Description Ther

Qin Shi Huang's National Road System Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 8054    Accepted Submission(s): 2869 Problem Desc

Error Curves Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 5588    Accepted Submission(s): 2112 Problem Description Josephina is

Oulipo Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 42886   Accepted: 17234 Description The French author Georges Perec (1936–1982) once wrote a book, L