TEST#1 [FIRST_TRY]

#include <stddef.h>

const char *odd_or_even(const int *v, size_t sz) {
  unsigned int result = 0;
  for(size_t i = 0; i < sz; i++) {
    result += v[i];
  }
  return result % 2 == 0 ? "even" : "odd";
}