呃呃呃呃呃呃呃呃,水进6000,,,,
#include <iostream>
#include <cmath>
using namespace std;
int main()
{
	int h,w;
	cin>>h>>w;
	int temp;
	if(h==w)
		temp=h+w;
	else
		temp=h>w?w*2+1:h*2+1;
	int ans=(int)sqrt((double)temp);
	if(ans)
		cout<<ans<<endl;
	else
		cout<<"Impossible"<<endl;
	return 0;
}