// clang-format off
#include <bits/stdc++.h>
#define int long long int
#define main signed main()
#define bye return 0
#define loop(i, a, n) for (int i = (a); i < (n); i++)
#define rep(i, n) loop(i, 0, n)
#define each(p, v) for (auto p = (v).begin(); p != (v).end(); p++)
#define all(v) (v).begin(), (v).end()
#define prec(n) fixed << setprecision(n)
#define dump(x) cerr << "(L" << __LINE__ << ") " << #x << " = " << (x) << endl
#define clr(x, a) memset(x, a, sizeof(x))
#define sum(v) accumulate(all(v), 0)
#define stlice(from, to) substr(from, (to) - (from) + 1)
#define odd(n) ((n) % 2)
#define even(n) (!odd(n))
#define INF 1000000000
#define MOD 1000000007
#define PI acos(-1)
#define pb push_back
#define mp make_pair
#define mt make_tuple
#define fi first
#define se second
#define vi vector<int>
#define vb vector<bool>
#define vc vector<char>
#define vs vector<string>
using namespace std;
// clang-format on
main {
int ma, da, mb, db;
cin >> ma >> da >> mb >> db;
int t[] = {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
int c = 0;
while (ma != mb) {
c += t[ma];
ma++;
}
c += db - da;
cout << c << endl;
bye;
}