bugs.cpp

#include <cstdlib>
#include <cstdio>
#include <cstring>
#include <cctype>
 
size_t mygets (char *out)
{
	int c;
	char *pout = out;
	while ((c = getchar ()) != '\n')
		*pout++ = c;
	*pout = '\0';
	return pout - out;
}
 
int main ()
{
	int line_no;
	while (scanf ("%d", &line_no) == 1)
	{
		int c;
		getchar ();
 
		static char marker[1001] = {0};
		char *pmarker = marker;
		while ((c = getchar ()) != '\n')
			if (isalpha (c))
				*pmarker++ = c;
		*pmarker = '\0';
		size_t marker_len = pmarker - marker;
 
		while (line_no--)
		{
			static char line[2000001] = {0};
			char *pline = line;
			size_t line_len = mygets (line) + 1;
 
			char *pbug;
			while ((pbug = strstr (pline, marker)))
			{
				line_len -= marker_len;
				memmove (pbug, pbug + marker_len, line_len - (pbug - line));
 
				pline = pbug - marker_len;
				if (pline < line)
					pline = line;
			}
			puts (line);
		}
	}
	return 0;
}