#include <iostream>

double mean(int nums[], int len) {
  int sum = 0;
  for (int i = 0; i < len; i++) {
    sum += nums[i];
  }
  return (double) sum / len;
}

int main(int argc, char **argv) {
  int nums[argc-1];
  for (int i = 1; i < argc; i++) {
    nums[i-1] = atoi(argv[i]);
  }
  
  std::cout << "Mean: " << mean(nums, argc - 1) << std::endl;
}