#include<bits/stdc++.h>
using namespace std;

#define rep(i, a, n) for(int i=(a); i<(n); ++i)
#define per(i, a, n) for(int i=(a); i>(n); --i)
#define pb emplace_back
#define mp make_pair
#define clr(a, b) memset(a, b, sizeof(a))
#define all(x) (x).begin(),(x).end()
#define lowbit(x) (x & -x)
#define fi first
#define se second
#define lson o<<1
#define rson o<<1|1
#define gmid l[o]+r[o]>>1

using ll = long long;
using ull = unsigned long long;
using pii = pair<int,int>;
using pll = pair<ll, ll>;
using ui = unsigned int;

constexpr int mod = 1e9 + 7;
constexpr int MOD = 998244353;
constexpr int inf = 0x3f3f3f3f;
constexpr double eps = 1e-8;

ll a, b;

int main(){
  scanf("%lld %lld", &a, &b);
  puts(a < abs(b) ? "Yes" : "No");
  return 0;
}