MaxMinSum.cc

#include <iostream>
#include <cmath>
#include <sstream>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <numeric>

int main()
{
  int n;
  std::cin >> n;
  std::vector<int> v;

  for (int i=0;i<n;i++) {
    int num;
    std::cin >> num;
    v.push_back(num);
  }

  std::cout << *std::min_element(v.begin(),v.end())
  << " " << *std::max_element(v.begin(),v.end())
  << " " << std::accumulate(v.begin(),v.end(),0)
  << std::endl;

  return 0;
}