#include <cstdio>
#include <numeric>
#include <thread>
#include <vector>
 
void p2()
{
	std::vector<int> data{};
	data.resize(10000);
	std::iota(data.begin(), data.end(), 0);
 
	unsigned long sum = 0;
	unsigned long gre = 0;
 
	std::thread t1{[&]() {
		for(const auto &num: data)
			sum += num;
	}};
	std::thread t2{[&]() {
		for(const auto &num: data)
		{
			if(num > 20)
				++gre;
		}
	}};
 
	t1.join();
	t2.join();
 
	fprintf(
		stdout,
		"Sum: %u\nGreater than 20: %u\n",
		sum, gre
	);
}
 
int main(int, const char **)
{
	p2();
	return 0;
}

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