#include<bits/stdc++.h>
using namespace std;
int d1,d2,d3,d4;
int month(int k)
{
if(k==1||k==3||k==5||k==7||k==8||k==10||k==12)
return 31;
else if(k==4||k==6||k==9||k==11)
return 30;
else if(k==2)
return 28;
}
int tianshu(int d1,int d2,int d3,int d4)
{
int p1=month(d1)-d2;
int ans=0;
if(d3-d1==0) return d4-d2;
else if(d3-d1==1) return p1+d4;
else if(d3-d1!=0||d3-d1!=1)
{
for(int i=d1+1;i<=d3-1;i++)
{
ans+=month(i);
}
return (month(d1)-d2)+ans+d4;
}
}
int main()
{
cin>>d1>>d2>>d3>>d4;
cout<<tianshu(d1,d2,d3,d4);
return 0;
}

#include<bits/stdc++.h>
using namespace std;

int main()
{
int n,n1,a,b,s=0,s1=0;
cin>>n>>a>>n1>>b;
switch(n)
{
case 1:s+=a;break;
case 2:s=s+a+31;break;
case 3:s=s+a+59;break;
case 4:s=s+a+90;break;
case 5:s=s+a+120;break;
case 6:s=s+a+151;break;
case 7:s=s+a+181;break;
case 8:s=s+a+212;break;
case 9:s=s+a+243;break;
case 10:s=s+a+273;break;
case 11:s=s+a+304;break;
case 12:s=s+a+334;break;
}
switch(n1)
{
case 1:s1+=b;break;
case 2:s1=s1+b+31;break;
case 3:s1=s1+b+59;break;
case 4:s1=s1+b+90;break;
case 5:s1=s1+b+120;break;
case 6:s1=s1+b+151;break;
case 7:s1=s1+b+181;break;
case 8:s1=s1+b+212;break;
case 9:s1=s1+b+243;break;
case 10:s1=s1+b+273;break;
case 11:s1=s1+b+304;break;
case 12:s1=s1+b+334;break;
}
cout<<s1-s;
return 0;

}

#include <iostream>
using namespace std;
int a[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
int main()
{
    int
            month,day,zhongjiancha,cha;cin>>month>>day;
    int month1,day1;cin>>month1>>day1;
    int benyuecha=a[month]-day;
    if(month+1==month1)
    {
        cha=a[month]-day;
        cout<<cha+day1;
    }
    if(month==month1)
        cout<<day1-day;
    if(month+1!=month1&&month!=month1)
    {
        for(int i=month+1;i<month1;i++)
            zhongjiancha+=a[i];
        cout<<zhongjiancha+benyuecha+day1;
    }
    return 0;
}