【CodeForces】[673A]Bear and Game

【CodeForces】[651B]Beautiful Paintings

【CodeForces】[621B]Wet Shark and Bishops

【CodeForces】[673B]Problems for Round

【CodeForces】[621A]Wet Shark and Odd and Even

【NYOJ】[1046]少乘法次数

【NYOJ】[1023] 取石子（一）

【UVa】[156]Ananagrams

【CodeForces】[75A]Life Without Zeros

【CodeForces】[66B]Petya and Countryside

【CodeForces】[66A]Petya and Java

【POJ】[3273]Monthly Expense

【POJ】[3258]River Hopscotch

【POJ】[2456]Aggressive cows

【UVa】[11582]Colossal Fibonacci Numbers!