来个不同做法的:(求点赞)

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
 int x,y;
 cin>>x>>y;//输入
 //输出
 if(abs(y)+abs(x)>=2) cout<<"no";
 else cout<<"yes";
 return 0;//完结散花
}

#include<bits/stdc++.h>
using namespace std;
int x,y;
int main(){
	cin>>x>>y;
	if(x>=-1&&x<=1&&y>=-1&&y<=1) cout<<"yes"<<endl;
	else cout<<"no";
	return 0;
}

#include <bits/stdc++.h>
using namespace std;
int a,b;
int main(){
	cin>>a>>b;
	if((a>=-1&&a<=1)&&(b>=-1&&b<=1)) cout<<"yes";
	else cout<<"no";
}
//简洁的代码，点个赞再走吧

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