CompetitiveProgramming/packets.cpp at main · darksidergod/CompetitiveProgramming · GitHub

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

using namespace std;

ll int maxDivisor(ll int n)
{
	ll int _max
    // Note that this loop runs till square root
    for (ll int i=1; i<=sqrt(n); i++)
    {
        if (n%i == 0)
        {
            // If divisors are equal, print only one
            if (n/i == i)
                {
                	if(i>=_max)
                		_max=i;
                }

            else // Otherwise print both
                {
                	if(i>=_max && i!=n)
                		_max=i;

                	if((n/i)>=_max && (n/i)!=n)
                		_max=(n/i);

                }
        }
    }

    return _max;
}

int main(void)
{
	ll int n;
	cin >> n;
	ll int res=maxDivisor(n);
	cout << res <<"\n";
	return 0;
}