mirror of
https://git.sb/baoshuo/OI-codes.git
synced 2024-09-20 06:45:26 +00:00
22 lines
409 B
C++
22 lines
409 B
C++
#include <iostream>
|
|
#include <iomanip>
|
|
|
|
using std::cin;
|
|
using std::cout;
|
|
const char endl = '\n';
|
|
|
|
int a, b, c, x;
|
|
|
|
int main() {
|
|
std::ios::sync_with_stdio(false);
|
|
cin >> a >> b >> c >> x;
|
|
if (x <= a) {
|
|
cout << 1 << endl;
|
|
} else if (x > b) {
|
|
cout << 0 << endl;
|
|
} else {
|
|
cout << std::fixed << std::setprecision(10) << 1.00 * c / (b - a) << endl;
|
|
}
|
|
return 0;
|
|
}
|