#include <stdint.h>

int strlen(char *s) {
    char *p = s;
    while (*p != '\0')
        p++;
    return p - s;
}

int main () {

  char *ptr1 = "Vladyslav";
  char *ptr2 = "Klyvets";

  int8_t name = strlen(ptr1);
  int8_t surname = strlen(ptr2);
  int8_t all = name + surname; 
      
      return 1;
}