Sleep Sort with OpenMP

sleep_sort.cpp

// version 1, just print it

#include <cstdio>
#include <vector>
#include <unistd.h> // sleep

void sleep_sort(std::vector<unsigned long long> &data) {

    const auto length = data.size();

    #pragma omp parallel num_threads(length)
    {
        #pragma omp for
        for (unsigned long i = 0; i < length; i++) {
            sleep(data[i]);
            printf("%llu\n", data[i]);
        }
    }
}

int main(int argc, char *argv[]) {

    std::vector<unsigned long long> data(argc-1);

    #pragma omp parallel for
    for (int i = 0; i < argc-1; i++) {
        sscanf(argv[i+1], "%llu", &data[i]);
    }

    sleep_sort(data);

    return 0;
}