#include <iostream>

using namespace std;

int main()
{
    long long n, m, zile, cp;
    cin >> n >> m;
    long long sgaus2 = 0;
    cp = n;
    zile = m + 1;
    if(zile >= n) cout << n;
    else
    {
        long long pas = 1ll << 30, i = 0;
        while(pas)
        {
            long long sgaus;
            if((i + pas - m) % 2)
            {
                sgaus = (i + pas + 1 - m) / 2;
                sgaus *= (i + pas - m);
            }
            else
            {
                sgaus = (i + pas - m) / 2;
                sgaus *= (i + pas + 1 - m);
            }
            sgaus += m;
            if(n - sgaus>= 0)
            {
                //cout << n << endl;
                n -= sgaus;
               // cout << n << ' ' << sgaus << endl;
               // n += m * (i + pas - m - 1);
                i+= pas;
                cout << sgaus << ' ' << i <<  endl;
            }
            pas /= 2;
        }
        if(n > 0)
        i++;
        zile = i;
        cout << zile << endl;
    }
    return 0;
}