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Eyad was given a simple math problem, but since he is very bad at math he asked you to help him.Given 4 numbers, a, b, c, and d. Your task is to find whether ab is less than cd or not.It is guaranteed

题目链接：HDU - 2045题目描述：

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DP

题目连接：51Nod - 1284 题目描述： 给出一个数N，求1至N中，有多少个数不是2 3 5 7的倍数。 例如N = 10，只有1不是2 3 5 7的倍数。 Input输入1个数N(1 <= N <= 10^18)。Output输出不是2 3 5 7的倍数的数共有多少。Sample Input10Sample Output1要求有多少个不是2的倍数&&不是3的倍数&&不是5的倍数&