#include <cstdint>
#include <iostream>
#include <string>

int main() {
	uint32_t Δ = 1;
	double π = 3.14159;
	std::string 你好 = "Hello";
	Δ++;
	std::cout << Δ << " :: " << π << " :: " << 你好 << std::endl;
}