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C1.cpp
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C1.cpp
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/*Author:Raunak Talwar MNNIT CSE 15
-----------------------------------------------------------------------------------------------------------------------------------
-----------------------------------------raunakrocks-------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------------------
*/
#include<cstdio>
#include<iostream>
#include<vector>
#include<queue>
#include<climits>
#include<cassert>
#include<cmath>
#include<cstring>
#include<map>
#include<stack>
#include<string>
#include<cstdlib>
using namespace std;
#define getx getchar_unlocked
#define pb push_back
#define mp make_pair
#define MAX(a,b) ((a >= b) ? (a) : (b))
#define MIN(a,b) ((a >= b) ? (b) : (a))
#define FOR(i,n) for(int i=0;i<(n);i++)
#define ABS(a) (((a) > 0) ? (a) : (-a))
#define DEB(n) cout<<"(<<< DEBUG "<<n<<" >>>)"<<endl
/*void inline inp(int &t)
{
int sign=1;
t=0;
char ch=getx();
while(ch<'0'||ch>'9')
{
if(ch=='-')
sign=-1;
ch=getx();
}
while(ch>='0'&&ch<='9')
{
t=(t<<3)+(t<<1)+(ch-'0');
ch=getx();
}
t=t*sign;
}*/
int main()
{
int n;
//DEB(t);
// inp(t);
// while(t--)
//{
//}
//inp(n);
scanf("%d",&n);
printf("%d\n",(int)ceil((n*n)/2.0));
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
if(i%2==0)
{
if(j%2==0)
printf("C");
else printf(".");
}
else
{
if(j%2==0)
printf(".");
else
printf("C");
}
//printf("\n");
}
printf("\n");
}
return 0;
}