新题解新思路

#include<bits/stdc++.h>
using namespace std;
int main(){
int a,b;
cin>>a>>b;
if (abs(a)==1&&abs(b)==1){
cout<<"yes";
}else if (abs(a)==1&&abs(b)==0){
cout<<"yes";
}else if (abs(a)0&&abs(b)1){
cout<<"yes";
}else if(a0&&b0){
cout<<"yes";
}else {
cout<<"no";
}
}