Car

#include <bits/stdc++.h>
#define ll long long
#define E 2.718281828459045

using namespace std;

int main () {
  double d;
  cin>>d;
  double x = 0;
  for (double z = d; z >= 0.00000001; z /= 2) {
    while (pow(E, x + z) + sqrt(x + z) <= d) x += z;
  }
  cout<<setprecision(100)<<x<<endl;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED