#include <algorithm>
#include <iterator>
#include <iostream>
#include <vector>

int main() {
    std::vector<int> v(100);
    //this just populates v with 1,2,3...100
    std::iota(v.begin(), v.end(), 1);

    std::transform(
        v.begin(), v.end()-1,
        v.begin()+1,
        std::ostream_iterator<int>(std::cout, "\n"),
        std::plus<int>()
    );
}