#include <bits/stdc++.h>
using namespace std;
int h1,h2,m1,m2,s1,s2,ans;
int main()
{
    cin>>h1>>m1>>s1>>h2>>m2>>s2;
    while(h1!=h2||m1!=m2||s1!=s2)
    {
        ans++;
        s1++;
        if(s1>=60)
        {
            s1-=60;
            m1++;
        }
        if(m1>=60)
        {
            m1-=60;
            h1++;
        }
    }
    cout<<ans;
    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