Practice: TREEWLK2, CODX09, DISTNUM2, ANDSQR, PDELIV, CHANOQ, XORMIN
LTIME65B: THREEFR, CLORGIRD, WEIRD2
NOV18B: CHFTIRED, CHHAPPY, PRDRG, HMAPPY1, GMEDIAN, MAGICHF2, BINSTR, PRITREE
DEC18A: INTXOR, MAXEP, CHFINTRO, CHFIDEAL, EDGEDIR, CBFEAST, COMAS, DLDAG
JAN19A: DPAIRS, XYPIZQ, DIFNEIGH, GRAPART, PARRTY, EARTSEQ, MGAME, HP18, FANCY, MATCHIT
APRIL19A: XORMIN, CHEFOFR, SJ1, SUBREM, KLPM, FENCE, MAXREM, STRCH, RECTARAN