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Description          有一只经过训练的蜜蜂只能爬向右侧相邻的蜂房,不能反向爬行.请编程计算蜜蜂从蜂房a爬到蜂房b的可能路线数.         其中,蜂房的结构如下所示.         Input 输入数据的第一行是一个整数N,表示测试实例的个数,然后是N 行数据,每行包含两个整数a和b(0<a<b<50).                  Output 对于每个测试实例,请输出蜜蜂从蜂房a爬到蜂房b的可能路线数,每个实例的输出占一行.              …
Description Sally Jones has a dozen Voyageur silver dollars. However, only eleven of the coins are true silver dollars; one coin is counterfeit even though its color and size make it indistinguishable from the real silver dollars. The counterfeit coi…
Description          在2×n的一个长方形方格中,用一个1× 2的骨牌铺满方格,输入n ,输出铺放方案的总数.         例如n=3时,为2× 3方格,骨牌的铺放方案有三种,如下图:                  Input 输入数据由多行组成,每行包含一个整数n,表示该测试实例的长方形方格的规格是2×n (0<n<=50).                  Output 对于每个测试实例,请输出铺放方案的总数,每个实例的输出占一行.              …
Description In a k bit 2's complement number, where the bits are indexed from 0 to k-1, the weight of the most significant bit (i.e., in position k-1), is -2^(k-1), and the weight of a bit in any position i (0 ≤ i < k-1) is 2^i. For example, a 3 bit…
Description          今年的ACM暑期集训队一共有18人,分为6支队伍.其中有一个叫做EOF的队伍,由04级的阿牛.XC以及05级的COY组成.在共同的集训生活中,大家建立了深厚的友谊,阿牛准备做点什么来纪念这段激情燃烧的岁月,想了一想,阿牛从家里拿来了一块上等的牛肉干,准备在上面刻下一个长度为n的只由"E" "O" "F"三种字符组成的字符串(可以只有其中一种或两种字符,但绝对不能有其他字符),阿牛同时禁止在串中出现O相邻的…
Description Bessie is training for her next race by running on a path that includes hills so that she will be prepared for any terrain. She has planned a straight path and wants to run as far as she can -- but she must be back to the farm within M se…
Description          国庆期间,省城HZ刚刚举行了一场盛大的集体婚礼,为了使婚礼进行的丰富一些,司仪临时想出了有一个有意思的节目,叫做"考新郎",具体的操作是这样的:         首先,给每位新娘打扮得几乎一模一样,并盖上大大的红盖头随机坐成一排;         然后,让各位新郎寻找自己的新娘.每人只准找一个,并且不允许多人找一个.         最后,揭开盖头,如果找错了对象就要当众跪搓衣板...         看来做新郎也不是容易的事情...     …
Description Give you two numbers A and B, if A is equal to B, you should print "YES", or print "NO".                         Input each test case contains two numbers A and B.                          Output for each case, if A is equa…
Description Problems involving the computation of exact values of very large magnitude and precision are common. For example, the computation of the national debt is a taxing experience for many computer systems.         This problem requires that yo…
Description Soon after he decided to design a T-shirt for our Algorithm Board on Free-City BBS, XKA found that he was trapped by all kinds of suggestions from everyone on the board. It is indeed a mission-impossible to have everybody perfectly satisf…