某岛

… : "…アッカリ~ン . .. . " .. .
September 7, 2013

SRM 508

September 6, 2013

SRM 559

September 3, 2013

BZOJ 3132. 上帝造题的七分钟

September 3, 2013

SPOJ 9138. Pyramid Sums 2

September 3, 2013

圆周 k 短弧

August 29, 2013

积分复化

August 22, 2013

UVa 12304. 2D Geometry 110 in 1!