푸키키키

#include <iostream>  

using namespace std;

int main(void)
{
	double a,b,c;
	
	cin >> a >> b;
	
	if(a<0 || b>10)
		return -1;
	cout.precision(11);

	c = a/b;
	cout << c;
	
	
						
}
 

#include <iostream>  

using namespace std;

int main(void)
{
	int x1,y1,r1,x2,y2,r2;
	int case1;
	int ans[1000] = {-77,};
	
	cin >> case1;
	
	
	for(int i=0;i> x1 >> y1 >> r1 >> x2 >> y2 >> r2;
		a = (x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1);
		if(a == 0 && r1==r2)//2
		{
			ans[i] = -1;
			continue;
		}
		if(a == 0 && r1!=r2)//1
		{
			
			ans[i]=0;
			continue;
		}
		if((r1+r2)*(r1+r2) < a)//1
		{
			ans[i] = 0;
			continue;
		}
		if((r1+r2)*(r1+r2) == a || (r1-r2)*(r1-r2)==a)
		{
			ans[i] = 1;
			continue;
		}
		if((r1+r2)*(r1+r2) > a && (r1-r2)*(r1-r2)

#include <iostream>  

using namespace std;

int main(void)
{
	int a, b;

	cin >> a >> b;
	if (a < 1 || a>9 || b < 1 || b>9)
		return -1;
	cout << a - b << endl;
	return 0;
	
}