#define _USE_MATH_DEFINES
#include<iostream>
#include<vector>
#include<algorithm>
#include<cmath>
#include<string>
#include<iomanip>
#include<numeric>
#include<queue>
#include<deque>
#include<stack>
#include<set>
#include<map>
#include<random>
using namespace std;
typedef long long ll;
const int mod=998244353;
int main(){
	int a,b;
	cin>>a>>b;
	double dega=(a*60+b)/(60*12.),degb=dega*12;
	dega-=floor(dega);
	degb-=floor(degb);
	if(dega<degb)
		dega+=1;
	cout<<int((dega-degb)/(11/(60.*60*12))+1e-6)<<endl;
}