solution.c (345B)
1 #include <stdio.h> 2 #include <string.h> 3 int main() { 4 char line[1000]; 5 char keep[1000]; 6 7 if (gets(line) != NULL) { 8 printf("%s\n", line); 9 strcpy(keep, line); 10 } else { 11 return; 12 } 13 14 while (gets(line) != NULL) { 15 if (strcmp(keep, line) == 0) { 16 continue; 17 } 18 strcpy(keep, line); 19 printf("%s\n", line); 20 } 21 }