真正的无脑(不建议学习,仅做参考)

注意0,0的情况:

#include<iostream>
using namespace std;
int main(){
    int x, y;
    cin >> x >> y;
    if(x == 1 && y == -1){
        cout << "yes";
        return 0;
    }
    if(x == 1 && y == 1){
        cout << "yes";
        return 0;
    }
    if(x == -1 && y == -1){
        cout << "yes";
        return 0;
    }
    if(x == -1 && y == 1){
        cout << "yes";
        return 0;
    }
    if(x == 0 && y == 0){
        cout << "yes";
        return 0;
    }
    cout << "no";
    return 0;
}