水题，模拟题，但仍需细心，多考虑

Posted 2021-01-12 landingguy

//http://codeforces.com/contest/1065/problem/B
#include <iostream>
#include <cmath>
using namespace std;

int main()
{
    long long n,m,num,s,a,b,c,minIS,maxIS;
    cin>>n>>m;
    if(n<2*m)
    {
        minIS=0;
    }
    else
    {
        minIS=n-2*m;
    }
    
    if(m==2)
    {
        maxIS=n-3;
    }
    else if(m==0)
    {
       maxIS=n;
    }
    else
    {
        maxIS=n-(1+(sqrt(1+8*m)))/2;
    }

    cout<<minIS<<" "<<maxIS<<endl;
    return 0;
}