func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int sum, a, b, c, ans = 0;     cin >> sum >> a >> b >> c;     for (int i = 0; i <= a; i += 2)       for (int j = 0; j <= c; ++j)         if (sum - i / 2 - 2 * j <= b && sum - i / 2 - 2 * j >= 0) ans++;     cout << ans << endl;     return 0;   }   