Car

#include <bits/stdc++.h>

using namespace std;

double calcVal(double init)
{
	return exp(init) + sqrt(init);
}

double diff(double a, double b)
{
	return abs(a-b);
}

int main() {
	double d;
	cin >> d;

	double ma = 6;
	double mi = 0;
	double best = 999999;
	double bestX = 3;
	double minDiff = 0.0000001;

	while (true) {
		double curX = (ma+mi) / 2.00;
		double curD = calcVal(curX);
		double diffDs = diff(curD, d);

		if (diffDs < minDiff) break;

		if (diff(curD, d) < best) {
			best = diff(curD, d);
			bestX = curX;
		}

		if (curD > d) {
			ma = curX;
		} else {
			mi = curX;
		}

	}

	cout << bestX << "\n";
	return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: WRONG ANSWER

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: ACCEPTED

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: ACCEPTED

Test 9

Verdict: WRONG ANSWER

Test 10

Verdict: WRONG ANSWER

Test 11

Verdict: WRONG ANSWER

Test 12

Verdict: WRONG ANSWER

Test 13

Verdict: WRONG ANSWER

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED