CF52B.Right Triangles
普及/提高-
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题目描述
You are given a n×m field consisting only of periods ('.') and asterisks ('*'). Your task is to count all right triangles with two sides parallel to the square sides, whose vertices are in the centers of '*'-cells. A right triangle is a triangle in which one angle is a right angle (that is, a 90 degree angle).
输入格式
The first line contains two positive integer numbers n and m ( 1<=n,m<=1000 ). The following n lines consist of m characters each, describing the field. Only '.' and '*' are allowed.
输出格式
Output a single number — total number of square triangles in the field. Please, do not use %lld specificator to read or write 64-bit integers in C++. It is preffered to use cout (also you may use %I64d).
输入输出样例
输入#1
2 2 ** *.
输出#1
1
输入#2
3 4 *..* .**. *.**
输出#2
9