Sicily 1133. SPAM

判断条件比较蛋疼

#include<iostream>
#include<string>
#include<cstring>

using namespace std;

int main()
{
	char str[1000];
	while(cin.getline(str,1000))
	{
		int n = strlen(str);
		for(int i = 1;i < n - 1;++i)
		{
			if(str[i] != '@') continue;
			int pos = i,tmp = i;
			if(str[i-1]==' '||str[i-1]=='.'||str[i-1]=='@'||str[i+1]==' '||str[i+1]=='.'||str[i+1]=='@') continue;
			while(pos - 1 >= 0 && str[pos-1] != ' ' && !(pos - 2 >= 0&& str[pos-1] == '.' && str[pos-2] == '.') && str[pos-1] != '@')
				pos--;
			if(str[pos] == '.') pos++;
			while(pos != i) 
			{
				cout<<str[pos];
				pos++;
			}
			while(pos+1 <= n-1 && str[pos+1] != ' ' && !(pos+2 <= n-1 && str[pos+1] == '.' && str[pos+2] == '.') && str[pos+1] != '@')
				pos++;
			if(str[pos] == '.') pos--;
			while(tmp <= pos)
			{
				cout<<str[tmp];
				++tmp;
			}
			cout<<endl;
		}
	}
	return 0;
}