#include<iostream>
using namespace std;
int main()
{
    int hour,minute,second; cin>>hour>>minute>>second;
    int hour1,minute1,second1; cin>>hour1>>minute1>>second1;
    int cnt=0;
    while(hour1!=hour||minute1!=minute||second!=second1)
    {
        second++;
        if(second>60)
        {
            second=1;
            minute++;
        }
        if(minute>60)
        {
            minute=1;
            hour++;
        }
        cnt++;
    }
    cout<<cnt;
    return 0;
}

#include <iostream>
using namespace std;
class Time
{
    int hour;
    int minute;
    int second;
public:
    void init(int h, int m, int s)
    {
        hour = h;
        minute = m;
        second = s;
    }
    int TimetoZero()
    {
        return (60 - second) + 60 * (59 - minute) + 3600 * (23 - hour);
    }
};
int main()
{
    int h1, m1, s1;     cin >> h1 >> m1 >> s1;
    int h2, m2, s2;     cin >> h2 >> m2 >> s2;
    Time t1, t2;
    t1.init(h1, m1, s1);
    t2.init(h2, m2, s2);
    cout << t1.TimetoZero() - t2.TimetoZero();
    return 0;
}

#include <iostream>
using namespace std;
int main()
{
int t11,t12,t13;
int t21,t22,t23;
cin>>t11>>t12>>t13;
cin>>t21>>t22>>t23;

if(t11<=24&&t21<=24&&t12<=60&&t22<=60&&t13<=60&&t23<=60)
{
t11=t11*3600;t21=t21*3600;
t12=t12*60;t22=t22*60;
t13=t11+t12+t13;t23=t21+t22+t23;
}

if(t13<t23)
t13=t23-t13;
else
t13=t13-t23;

cout<<t13;

return 0;
}