#include <iostream>
#include <cmath>
#include <vector>
#include <string.h>
#include <bits/stdc++.h>
#include <cstdlib>
#include <time.h>
#include <fstream>
#include <iterator>
#include <utility>
#include <algorithm>
#include <set>
#include <map>
#include <bitset>
using namespace std;

#define ll long long
#define ld long double
typedef vector<int> vi;
typedef vector<ll> vill;
#define all(v) ((v).begin()), ((v).end())
#define sz(v) ((ll)((v).size()))

#define vinp(v, n)               \
    for (ll i = 0; i < (n); i++) \
    cin >> (v)[i]
#define printv(v)      \
    for (auto i : (v)) \
    cout << i << " "
#define Bustany;            \
    ios::sync_with_stdio(0); \
    cin.tie(0);              \
    cout.tie(0);
#define loop(i, n) for (int(i) = 0; (i) < (n); (i)++)
#define _CRT_SECURE_NO_WARNING
const ll MOD = 1000000007;

void solve()
{
    ll a,b;
    cin >> a >>b;
    if((a>0 && b>0 && a>LONG_LONG_MAX-b) || (a<0 && b<0 && a<LONG_LONG_MIN-b)){
        cout << "YES";
    }
    else{
        cout << "NO";
    }
}

int main()
{
    Bustany
    int t = 1;
    // cin >> t;
    while (t--)
    {
        solve();
    }
}