public void Solve(ConsoleInput cin)
{
var A = cin.ReadInt;
var B = cin.ReadInt;
var C = cin.ReadInt;
var X = cin.ReadInt;
var ans = 0;
for (int i = 0; i <= A; ++i)
{
for (int j = 0; j <= B; ++j)
{
for (int k = 0; k <= C; ++k)
{
if (500 * i + 100 * j + 50 * k == X)
{
ans++;
}
}
}
}
WriteLine(ans);
}
public void Solve(ConsoleInput cin)
{
var s = cin.Read;
WriteLine(s.Count(x => x == '1'));
}