#include <stdio.h>

float function1(int a, int b);

int function2(int a[], int b);

int main(void) {
  float c = function1(3, 2000);
  int i[6] = {1, 2, 3, 4, 5, 0};

  if (c < 0)
    printf("value(s) not appropriate\n");
  else printf("%.3f\n", function1(3, 2000));
  printf("%.3f\n", function1(3, 999));



  return 0;
}

float function1(int a, int b) {
  if (b > 1000 || b < 0)
    return -1;
  if (a < 0) 
    return -2;
  
  return a + (((float) b) / 1000);

}

int function2(int array[], int value) {
  int i = 0;

  while (array[i]) {
    if (array[i] == value) 
      return i;

    i++;
  }

  return -1;
}