#include<stdio.h>
int X,Y;
int px[] = {-2,-2,-1,-1,1,1,2,2};
int py[] = {-1,1,-2,2,-2,2,-1,1};
int search(int nx,int ny,int i);
main(){
    scanf("%d%d",&X,&Y);
    printf("%s\n",search(0,0,3)?"YES":"NO");

}
int search(int nx,int ny,int i){
    if(nx==X && ny==Y){return 1;}
    if(i == 0){return 0;}
    for(int j = 0;j < 8;j++){
        if(search(nx+px[j],ny+py[j],i-1)){return 1;}
    }
    return 0;
}