codeforces 629A Far Relative’s Birthday Cake

A. Far Relative’s Birthday Cake

time limit per test

1 second

memory limit per test

256 megabytes

input

standard input

output

standard output

Door's family is going celebrate Famil Doors's birthday party. They love Famil Door so they are planning to make his birthday cake weird!

The cake is a n × n square consisting of equal squares with side length 1. Each square is either empty or consists of a single chocolate. They bought the cake and randomly started to put the chocolates on the cake. The value of Famil Door's happiness will be equal to the number of pairs of cells with chocolates that are in the same row or in the same column of the cake. Famil Doors's family is wondering what is the amount of happiness of Famil going to be?

Please, note that any pair can be counted no more than once, as two different cells can't share both the same row and the same column.

Input

In the first line of the input, you are given a single integer n (1 ≤ n ≤ 100) — the length of the side of the cake.

Then follow n lines, each containing n characters. Empty cells are denoted with '.', while cells that contain chocolates are denoted by 'C'.

Output

Print the value of Famil Door's happiness, i.e. the number of pairs of chocolate pieces that share the same row or the same column.

Examples

input

3
.CC
C..
C.C

output

4

input

4
CC..
C..C
.CC.
.CC.

output

9

Note

If we number rows from top to bottom and columns from left to right, then, pieces that share the same row in the first sample are:

1. (1, 2) and (1, 3)
2. (3, 1) and (3, 3)

Pieces that share the same column are:

1. (2, 1) and (3, 1)
2. (1, 3) and (3, 3)

题意：一个矩形的蛋糕，C代表巧克力，点（.）代表什么也没有，每一行或者每一列的巧克力的对数代表幸福值，问题目中所给数据的幸福值是多少

题解：记录每一行每一列的C的个数x，然后对其求组合C（x，2）即可，将所有的组合数相加

#include<stdio.h>
#include<string.h>
#include<string>
#include<math.h>
#include<algorithm>
#define LL long long
#define PI atan(1.0)*4
#define DD double
#define MAX 110
#define mod 10007
#define dian 1.000000011
#define INF 0x3f3f3f
using namespace std;
char s[MAX][MAX];
int row[MAX],col[MAX];
int main()
{
    int n,m,j,i,t;
	while(scanf("%d",&t)!=EOF)
	{
		memset(row,0,sizeof(row));//记录每行C的个数
		memset(col,0,sizeof(col));//记录每列C的个数
		for(i=0;i<t;i++)
		    scanf("%s",s[i]);
		for(i=0;i<t;i++)
		{
			for(j=0;j<t;j++)
			{
				if(s[i][j]=='C')
				    row[i]++;
				if(s[j][i]=='C')
				{
					//printf("%d %d#\n",j,i);
					col[i]++;
				}

			}
		}
		int sum=0;
		for(i=0;i<t;i++)
		{
			//printf("%d\n%d*\n",row[i],col[i]);
			sum+=(row[i]*(row[i]-1))/2;//求组合数
			sum+=(col[i]*(col[i]-1))/2;
		}
		printf("%d\n",sum);
	}
	return 0;
}