题解

*#include<bits/stdc++.h>
using namespace std;
int main(){
int x,y;
cin>>x>>y;
if(x1&&y1){
cout<<"yes";
}
else if(x1&&y-1){
cout<<"yes";
}
else if(x==-1&&y==-1){
cout<<"yes";
}
else if(x0&&y0){
cout<<"yes";
}
else if(x==-1&&y==1){
cout<<"yes";
}
else{
cout<<"no";
}

return 0;

}

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