#include <bits/stdc++.h>
#define INIT std::ios::sync_with_stdio(false);std::cin.tie(0);
// VAR(int, x);
#define VAR(type, ...)type __VA_ARGS__;Scan(__VA_ARGS__);
template<typename T> void Scan(T& t){std::cin >> t;}
template<typename First,typename...Rest>void Scan(First& first,Rest&...rest){std::cin>>first;Scan(rest...);}
#define OUT(d) std::cout<<(d);
#define FOUT(n, d) std::cout<<std::fixed<<std::setprecision(n)<<(d);
#define SOUT(n, c, d) std::cout<<std::setw(n)<<std::setfill(c)<<(d);
#define SP std::cout<<" ";
#define TAB std::cout<<"\t";
#define BR std::cout<<"\n";
#define ENDL std::cout<<std::endl;
#define FLUSH std::cout<<std::flush;
#define VEC(type, c, n) std::vector<type> c(n);for(auto& i:c)std::cin>>i;
#define MAT(type, c, m, n) std::vector<std::vector<type>> c(m, std::vector<type>(n));for(auto& r:c)for(auto& i:r)std::cin>>i;
#define ALL(a) (a).begin(),(a).end()
#define FOR(i, a, b) for(int i=(a);i<(b);++i)
#define RFOR(i, a, b) for(int i=(b)-1;i>=(a);--i)
#define REP(i, n) for(int i=0;i<int(n);++i)
#define RREP(i, n) for(int i=(n)-1;i>=0;--i)
#define PAIR std::pair<int, int>
#define IN(a0, y, a1, b0, x, b1) (a0<=y && y<a1 && b0<=x && x<b1)
#define SHOW(d) {std::cout << #d << "\t:" << d << "\n";}
#define SHOWVECTOR(v) {std::cout << #v << "\t:";for(const auto& i : v){std::cout << i << " ";}std::cout << "\n";}
#define SHOWVECTOR2(v) {std::cout << #v << "\t:\n";for(const auto& i : v){for(const auto& j : i){std::cout << j << " ";}std::cout << "\n";}}
#define SHOWPAIRVECTOR(v) {for(const auto&& i:v){std::cout<<'('<<i.first<<", "<<i.second<<") ";}std::cout<<"\n";}
#define CHECKTIME(state) {auto start=std::chrono::system_clock::now();state;auto end=std::chrono::system_clock::now();auto res=std::chrono::duration_cast<std::chrono::nanoseconds>(end-start).count();std::cerr<<"[Time:"<<res<<"ns  ("<<res/(1.0e9)<<"s)]\n";}

//#define int ll
using ll = long long;
constexpr ll INF = 1LL<<60;

int dx[8] = {-1,  1,  2, 2, 1, -1, -2, -2};
int dy[8] = {-2, -2, -1, 1, 2,  2, 1 , -1};

class POS{
    public:
    int depth;
    PAIR pos;
    POS(int d, PAIR p) : depth(d), pos(p){}
};

signed main(){
    INIT;
    CHECKTIME([]
    {
        VAR(int, x, y);
        PAIR obj(x, y);
        //std::vector<std::vector<int>> mat(21, std::vector<int>(21, 0));
        std::queue<POS> que;
        que.push(POS(0, PAIR(0, 0)));
        while(!que.empty()){
            POS now = que.front(); que.pop();
            //mat[now.pos.first+10][now.pos.second+10] = now.depth;
            if(now.pos==obj){
                OUT("YES")BR;
                return 0;
            }
            REP(j, 8){
                POS t(now.depth+1, PAIR(now.pos.first+dx[j], now.pos.second+dy[j]));
                if(t.depth<3) que.push(t);
                //mat[t.pos.first+10][t.pos.second+10] = t.depth;
                if(t.pos==obj){
                    OUT("YES")BR;
                    return 0;
                }
            }
        }
        //mat[10][10] = 9;
        //SHOWVECTOR2(mat);
        OUT("NO")BR;
        return 0;
    }
    ());
    return 0;
}