#include <stdio.h>
unsigned max(unsigned tab[], size_t len){
  unsigned res = 0;
  for(size_t i = 0 ; i < len; ++i)
    if(res < tab[i]) res = tab[i];
  return res;
}
int main(){
  unsigned data[4] = {5,6,8,7};
  printf("%u\n", max(data, 4));
  return 0;
}