【IOI2014】Friend
【Codeforces 1188C】Array Beauty
【Codeforces 1175G】Yet Another Partiton Problem
【Codeforces 730F】Ber Patio
【AtCoder Regular Contest 087 F】Squirrel Migration
【AtCoder Regular Contest 085 F】NRE
【AtCoder Regular Contest 073 F】Many Moves
【AtCoder Regular Contest 072 E】Alice in linear land
【AtCoder Regular Contest 071 F】Infinite Sequence
【AtCoder Regular Contest 070 E】NarrowRectangles