Give a time.(hh:mm:ss)，you should answer the angle between any two of the minute.hour.second hand Notice that the answer must be not more 180 and not less than...
soda has a set $S$ with $n$ integers ${1, 2, dots, n}$. A set is called key set if the sum of integers in the set is an even number. He wants to know how man...
Cat Noku has obtained a map of the night sky. On this map, he found a constellation with n stars numbered from 1to n. For each i, the i-th star is located at co...
Today, Wet Shark is given n integers. Using any of these integers no more than once, Wet Shark wants to get maximum possible even (divisible by 2) sum. Please, ...
Lele now is thinking about a simple function f(x). If x < 10 f(x) = x. If x >= 10 f(x) = a0 * f(x-1) + a1 * f(x-2) + a2 * f(x-3) + …… + a9 * f(x-10); And ai...
A friend of you is doing research on the Traveling Knight Problem (TKP) where you are to find the shortest closed tour of knight moves that visits each square o...
FatMouse prepared M pounds of cat food, ready to trade with the cats guarding the warehouse containing his favorite food, JavaBean. The warehouse has N rooms. ...
Jerry is caught by Tom. He was penned up in one room with a door, which only can be opened by its code. The code is the answer of the sum of the sequence of num...
