seong-min-s · August 28, 2019 03:31
diff --git a/설탕배달.cpp b/설탕배달.cpp
 #include<iostream>
 using namespace std;

 int main(void)
 {
 	int n, p, q, r;

 	cin >> n;
 	p = n / 5;
 	q = n % 5;
 	r = q % 3;

 	while (r != 0)
 	{
 		p--;
 		q += 5;
 		r = q % 3;
 	}
 	r = (p < 0) ? -1 : p + q / 3;
 	cout << r;

 	return 0;
 }
	#include<iostream>
	using namespace std;

	int main(void)
	{
	int n, p, q, r;

	cin >> n;
	p = n / 5;
	q = n % 5;
	r = q % 3;

	while (r != 0)
	{
	p--;
	q += 5;
	r = q % 3;
	}
	r = (p < 0) ? -1 : p + q / 3;
	cout << r;

	return 0;
	}