烂人醉

Lucky 7 in the PocketTime Limit: 1 Second Memory Limit: 65536 KBBaoBao loves number 7 but hates number 4, so he refers to an integer x as a “lucky integer” if x is divisible by 7 but not divis...

AbbreviationTime Limit: 1 Second Memory Limit: 65536 KBIn the Test of English as a Foreign Language (TOEFL), the listening part is very important but also very hard for most students since it i...

Fibonacci in the PocketTime Limit: 1 Second Memory Limit: 65536 KBDreamGrid has just found a Fibonacci sequence f1,f2,··· and two integers and in his right pocket, where fk indicates the k-th...