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题目描述 Farmer John has noticed that the quality of milk given by his cows varies from day to day. On further investigation, he discovered that although 阅读全文
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题目描述 给定两个字符串，求出在两个字符串中各取出一个子串使得这两个子串相同的方案数。两个方案不同当且仅当这两个子串中有一个位置不同。 输入输出格式 输入格式： 两行，两个字符串s1，s2，长度分别为n1，n2。1 <=n1, n2<= 200000，字符串中只有小写字母 输出格式： 输出一个整数表 阅读全文
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discription Given the value of N, you will have to find the value of G. The definition of G is given below:Here GCD(i, j) means the greatest common di 阅读全文