Problem A:小兔的棋盘(HDU-2067)(卡特兰数):点击这里
Problem B:Co-prime(HDU-4135)(容斥原理):点击这里
Problem C:How many integers can you find(HDU-1796)(容斥原理):点击这里
Problem D:Halloween treats(HDU-1808)(抽屉原理):点击这里
Problem E:GCD(HDU-1695)(莫比乌斯反演):点击这里
Problem F:吃糖果(HDU-1205)(抽屉原理):点击这里
Problem G:Xiao Ming's Hope(HDU-4349)(卢卡斯定理):点击这里
Problem H:Binomial Showdown(POJ-2249)(组合数):点击这里
Problem I:Combinations(POJ-1306)(组合数):点击这里
Problem J:Find a multiple(POJ-2356)(抽屉原理):点击这里
Problem K:
Problem L:
Problem M:
Problem N:
Problem O:
Problem P:
Problem Q: