#include<bits/stdc++.h>
using lint=long long;
int main(){
    std::cin.tie(nullptr);std::ios_base::sync_with_stdio(false);
    std::cout.setf(std::ios_base::fixed);std::cout.precision(15);
    lint k=3,K=2*k+1;
    std::vector<std::vector<lint>>a(K,std::vector<lint>(K));
    a.at(0).at(0)=1;
    std::vector<lint>dx={+2,+2,+1,+1,-1,-1,-2,-2};
    std::vector<lint>dy={+1,-1,+2,-2,+2,-2,+1,-1};
    for(lint i=1;i<=k;i++){
        auto b=a;
        for(lint x=0;x<K;x++){
            for(lint y=0;y<K;y++){
                if(!a.at(x).at(y))continue;
                for(lint j=0;j<8;j++){
                    lint nx=std::abs(x+dx.at(j));
                    lint ny=std::abs(y+dy.at(j));
                    if(K<=nx||K<=ny)continue;
                    b.at(nx).at(ny)=1;
                }
            }
        }
        b.swap(a);
    }

    lint x,y;std::cin>>x>>y;
    x=std::abs(x);
    y=std::abs(y);
    std::cout<<(x<K&&y<K&&a.at(x).at(y)?"YES":"NO")<<'\n';
}