第一（题目是错的)

//正确输出格式：(1,2)(中间带空格（“”代表空格）)

https://xmcdn.oss-cn-shanghai.aliyuncs.com/cpp_community/images/sticker/acgo_gif/%E5%B4%87%E6%8B%9C.gif

#include <iostream>
using namespace std;
int main(){
    int n,i,j;
    cin >> n>>i>>j;
    
    for(int k=1;k<=n;k++){
		cout << "("<<i<<","<<k<<")"<<" ";
    }
//第一行
    cout <<endl;
    for(int k=1;k<=n;k++){
        cout <<"("<<k<<","<<j<<")"<<" ";
    }
//第二行
    cout <<endl;
    for(int k=1;k<=n;k++){
        for(int l=1;l<=n;l++){
            if(j-i==l-k){//随机数对的差=给定数对的差
                cout <<"("<<k<<","<<l<<") ";
            }
        }
    }
//第三行
    cout <<endl;
    for(int k=n;k>=1;k--){
        for(int l=1;l<=n;l++){
            if(i+j==l+k){//随机数对的和=给定数对的和
                cout <<"("<<k<<","<<l<<") ";
            }
            
                     
        }
    }
//第四行
    return 0;
}[:糟糕]