#include <iostream>
using namespace std;
int main() {
int a = 1, b = 16; // ułamek 1/16
int x = a;
cout << "0.";
while (x > 0) {
x *= 2;
if (x >= b) {
cout << 1;
x -= b;
} else {
cout << 0;
}
}
cout << endl;
return 0;
}
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