如题。

Solutions can be reported in arbitrary order.

P3540 [POI2012] SQU-Squarks = BZOJ2797 Squarks = EOJ3673 唐纳德先生与这真的是签到题吗 > P1286 两数之和 = UVA10202 Pairsumonious Numbers

HDU2515 Yanghee 的算术