#include <fmt/format.h>
#include <iostream>
#include <string>

using namespace std;

int main(int argc, char **argv) {
	int i = 0;
	double d = 0;
	try {
		i = stoi(string(argv[1]));
	} catch (exception ex) {
		cout << "Can't convert to integer!" << endl;
		exit(1);
	}
	try {
		d = stod(string(argv[2]));
	} catch (exception ex) {
		cout << "Can't convert to floating point!" << endl;
		exit(1);
	}
	cout << fmt::format("i + d = {0:f}", i + d) << endl;
	return 0;
}