main.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
char buffer[2002000]; 
char pattern[1024];
 
int blength;
int plength;
 
int i, n;
 
int replace()
{
    char* start;
    char* found;
    int offset;
 
    offset = 0;
 
    start = buffer;
 
    do
    {
      found = strstr(start, pattern);
 
      if (found)
      {
        *found = 0;                
        strcpy(found, found + plength);
        start = found - plength;
        if (start < buffer)
        {
          start = buffer;
        }
      }
    }while(found);
 
    printf("%s", buffer);
 
    return 0;
}
 
int main(int argc, char *argv[])
{
  while (scanf("%d %s", &n, pattern) == 2)
  {        
        plength = strlen(pattern);
        gets(buffer); /* sezereme konec radky */
        blength = strlen(buffer);
 
        for (i = 0; i < n; i++)
        {
            fgets(buffer, 2000010, stdin);
            replace();
        }        
  }
  return 0;
}