代码如下，我觉得没啥问题

#include<iostream>
using namespace std;
struct ac
{
	int x;
	int y;
};
ac a[2005][2005];
int main()
{
	int m,n,sx,sy;
	cin >> m >> n >> sx >> sy;
	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=m;j++)
		{
			cin >> a[i][j].x >> a[i][j].y;
		}		
	}
	cout << sx << " " << sy << endl;
	for(int i=1;i<=m;i++)
	{
		for(int j=1;j<=n;j++)
		{
			if(a[i][j].x != 0 || a[i][j].y != 0)
			{
				cout << a[i][j].x << " " << a[i][j].y << endl;
			}
			else
			{
				return 0;
			}
		}		
	}
	return 0;
}