#define arrSize(x) sizeof(x) / sizeof(x[0])

int arr[5] = {25, 27, 24, 28, 26};


void setup() {
  Serial.begin(9600);
  Serial.println(getMin(arr, arrSize(arr)));
}


int getMin(int a[], int size) {
  int min = a[0];
  for (int i = 0; i < size; i++) {
    if (a[i] < min)
      min = a[i];
  }
  return min;
}

void loop() {}