Beecrowd 3141 - C

#include <stdio.h>
#include <string.h>
#include <malloc.h>

int main() {
  size_t size = 52;
  char date1[12], date2[12], *p;
  p = (char*)malloc(size * sizeof(char));
  getline(&p, &size, stdin);
  p[strlen(p)-1] = '.';
  scanf("%s%s", date1, date2);
  int day1 = (date1[0] - '0') * 10 + (date1[1] - '0');
  int day2 = (date2[0] - '0') * 10 + (date2[1] - '0');
  int month1 = (date1[3] - '0') * 10 + (date1[4] - '0');
  int month2 = (date2[3] - '0') * 10 + (date2[4] - '0');
  int year1 = (date1[6] - '0') * 1000 + (date1[7] - '0') * 100 + (date1[8] - '0') * 10 + (date1[9] - '0');
  int year2 = (date2[6] - '0') * 1000 + (date2[7] - '0') * 100 + (date2[8] - '0') * 10 + (date2[9] - '0');
  int anos = year1 - year2 - 1 + ((month1 == month2 && day1 >= day2) || month1 > month2);
  if(day1 == day2 && month1 == month2) printf("Feliz aniversario!\n");
  printf("Voce tem %d anos %s\n", anos, p);
}