#include <iostream>
#include <algorithm>
#include <vector>
#include <numeric>

int main() {
    std::vector<int> v1(5);
    std::iota(begin(v1), end(v1), 0);
    for(const auto i: v1) { std::cout << i << ' '; } std::cout << std::endl;
    
    std::cout << std::accumulate(begin(v1), end(v1), 0) << std::endl;
    
    const std::vector<int> v2 = { 2, 3, 4, 0, 1 };
    std::cout << std::inner_product(begin(v1), end(v1), begin(v2), 0) << std::endl;
    // = 0 * 2 + 1 * 3 + 2 * 4 + 3 * 0 + 4 * 1
    
    std::vector<int> v3(v2.size());
    std::adjacent_difference(begin(v1), end(v1), begin(v3));
    for(const auto i: v3) { std::cout << i << ' '; } std::cout << std::endl;   
    
    std::vector<int> v4 { v2 };
    std::adjacent_difference(begin(v4), end(v4), begin(v4));
    for(const auto i: v4) { std::cout << i << ' '; } std::cout << std::endl;   
}