src/hwrld.h


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#include <iostream>
#include <vector>


std::string concat(std::string &a, std::string &b) {
    return a + ' ' + b;
}

int sum_of_ints(std::vector<int> &v) {
    int sum = 0;
    for(auto elm : v) {
        sum += elm;
    }

    return sum;
}