Outputting numbers with delimitting spaces in C++ for competitive programming.

delim-space.cpp

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

using namespace std;

int main() {
    int nums[3];
    for (auto &num: nums) {
        cin >> num;
    }
    cout << accumulate(
        begin(nums) + 1,
        end(nums),
        to_string(nums[0]),
        [](string s0, int const& s1) {
            return s0 += " " + to_string(s1);
            
        }
    ) << "\n";
}