#include<bits/stdc++.h> 
using namespace std;
int main()
{
	int a,b;
	cin>>a>>b;
	if(a>=b)
	{
		b=b+24;
	}
	cout<<b-a;
	return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b;
	cin>>a>>b;
	if(a>=b)
	{
		b=b+24;
	}
	cout<<b-a;
	return 0;
}