Practice: SPREAD, CSUBQ, FLIPCOIN, CONFLIP, MULTQ3, LEPAINT, PERMPART, LEMUSIC, CHEFD, ANUCBC, SEAGM, CHEFQUE, ODTPIC, XRQRS, AMCS03, ANUGCD, FRBSUM, TROOT, SUMTRIAN, SNCK01, TREEROOT, ORDERS, ICPC16F, PRIMEDST, SORTALGO, GERALD07, CIRMERGE, TRDST, MVAL, MININS, JTSARTR, BRBAL, BULBS, ROOTTREE, UKROBOT, DDIMMST, KEVIN, C5, GASOLINE, CKWR08, CKWR01, CKWR04, CKWR03, CKWR02, CKWR09, CKWR05, CKWR06, CKWR07, ANITGUY2, ANITGUY1, EXUNA, EXUNB, EXUND, EXUNC, SWAP10HG, THREE, EVSTR, KTTREE, SEDARR, HRSCPMTR, CYBV, CAB, AGCY, BATTERY, RICY, TRECYB, ADTCHP