【杭电】[1009]FatMouse' Trade

【NYOJ】[1143]小珂的苦恼

【POJ】[1006]Biorhythms

【Codeforces】[580B]Kefa and Company

【Codeforces】[599B]Spongebob and Joke

【Codeforces】[612B]HDD is Outdated Technology

【Codeforces】[597B]Restaurant

【Codeforces】[615A]Bulbs

【Codeforces】[611A]New Year and Days

【Codeforces】[610A]Pasha and Stick

【Codeforces】[612A]The Text Splitting

【Codeforces】[604A]Uncowed Forces

【Codeforces】[599A]Patrick and Shopping

欧几里得——GCD引发的讨论

【郑轻】[1125]上三角矩阵的判断