#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,a,b; // a = 行，b = 列。先输入行，在输入列。
    cin>>n>>a>>b;
    for(int i = 1;i <= n;i++)
    {
        cout<<"("<<a<<","<<i<<") ";
    }
    cout<<endl;
    for(int i = 1;i <= n;i++)
    {
        cout<<"("<<i<<","<<b<<") ";
    }
    cout<<endl;
    for(int i = 1;i <= n;i++)
    {
        for(int j = 1;j <= n;j++)
        {
            if(i - j == a - b)
            {
                cout<<"("<<i<<","<<j<<") ";
            }
        }
    }
    cout<<endl;
    for(int i = n;i >= 1;i--)
    {
        for(int j = 1;j <= n;j++)
        {
            if(i + j == a + b)
            {
                cout<<"("<<i<<","<<j<<") ";
            }
        }
    }
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,a,b;
    cin>>n>>a>>b;
    for(int i=1;i<=n;i++){
        cout<<"("<<a<<","<<i<<")";
    }
    cout<<endl;
    for(int i=1;i<=n;i++){
        cout<<"("<<i<<","<<b<<")";
    }
    cout<<endl;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            if(i-j==a-b){
                cout<<"("<<i<<","<<j<<")";
            }
        }
    }
    cout<<endl;
    for(int i=n;i>=1;i--){
        for(int j=1;j<=n;j++){
            if(i+j==a+b){
                cout<<"("<<i<<","<<j<<")";
            }
        }
    }
    return 0;
}

#include<bits/stdc++.h> using namespace std; int main() { int n,a,b; cin>>n>>a>>b; for(int i=1;i<=n;i++) { cout<<"("<<a<<","<<i<<") "; } cout<<endl; for(int i=1;i<=n;i++) { cout<<"("<<i<<","<<b<<") "; } cout<<endl; for(int i=1;i<=n;i++) { for(int j=1;j<=n;j++) { if(i-ja-b) { cout<<"("<<i<<","<<j<<") "; } } } cout<<endl; for(int i=n;i>=1;i--) { for(int j=1;j<=n;j++) { if(i+ja+b) { cout<<"("<<i<<","<<j<<") "; } } }

return 0;

}$$

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,a,b;
	cin>>n>>a>>b;
	for(int i=1;i<=n;i++)
	{
		cout<<"("<<a<<","<<i<<") ";
	}
	cout<<endl;
	for(int i=1;i<=n;i++)
	{
		cout<<"("<<i<<","<<b<<") ";
	}
	cout<<endl;
	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=n;j++)
		{
			if(i-j==a-b)
			{
				cout<<"("<<i<<","<<j<<") ";
			}
		}
	}
	cout<<endl;
	for(int i=n;i>=1;i--)
	{
		for(int j=1;j<=n;j++)
		{
			if(i+j==a+b)
			{
				cout<<"("<<i<<","<<j<<") ";
			}
		}
	} 
	 
    return 0;
}