aproximator

#include <iostream>
#include <cmath>
using namespace std;

int main()
{
    int number;

    cout << "Insert a natural number: ";
    cin >> number;

    float root = sqrt(number);

    if((ceil(root) - root) > (root - floor(root)))
        cout << floor(root) << endl;
    else if((ceil(root) - root) < (root - floor(root)))
        cout << ceil(root) << endl;
    else
        cout << ceil(root) << endl;

    return 0;
}