#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 <bits/stdc++.h>
using namespace std;
int main( )

{

int s,f,m,s1,f1,m1;
cin>>s>>f>>m>>s1>>f1>>m1;
m=m+s*3600+f*60;
m1=m1+s1*3600+f1*60;
cout<<m1-m;
return 0;

}

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
int N,f,z=0,i=1;
cin>>N;
for(;i<=N;i++)
{
cin>>f;
if(f<60)
z++;
}
cout<<z;
return 0;
}//专坑双胞胎