self-closing……

~~You~~We may infer the equality from above（via the area of the whole rectangle）.

[cf 316E3] Summer Homework

无题

暑期总结 #2

[hdu 6366] black-and-white

[bzoj 2049] [Sdoi2008]Cave 洞穴勘测

[agc006] C – Rabbit Exercise

[agc005] D – ~K Perm Counting

[hdu 4913] Least common multiple

[agc004] C – AND Grid