CodeForces 510A Fox And Snake

http://codeforces.com/problemset/problem/510/A

模拟水水题

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,m;
	while(cin>>n>>m)
	{
	   for(int i=1;i<=n;i++)
	   {
	   	if(i%2==1)
	   	{
	   		for(int j=0;j<m;j++)
	   		{
	   			cout<<"#";
			}
			cout<<endl;
		}
		else {
			if(i%4==0)
			{
				cout<<"#";
				for(int j=0;j<m-1;j++)
	   		{
	   			cout<<".";
			}
			cout<<endl;
			}
			else{
				for(int j=0;j<m-1;j++)
	   		{
	   			cout<<".";
			}
			cout<<"#"<<endl;
			}
		}
	   }
	}
	return 0;
}