C++ Accumulate and Transform

#include <algorithm>
#include <functional>
#include <iostream>
#include <iterator>
#include <numeric>
#include <vector>
using namespace std;
int main() {
  vector<int> v = {1, 2, 3, 4, 5};
  for (int& e: v) cout << e << ' '; cout << endl;
  cout << "Accumulate: " << accumulate(v.begin(), v.end(), 0) << endl;

  vector<int> u = {10, 20, 30, 40, 50};
  vector<int> x;
  x.resize(v.size());
  transform(v.begin(), v.end(), u.begin(), x.begin(), plus<int>());
  for (int& e: x) cout << e << ' '; cout << endl;
}