标程：@

在次感谢标程审核人@

#include<bits/stdc++.h>
using namespace std;
long long a[1005][1005],b[1005][1005],n,m,x,y;
int main(){
	cin>>n>>m;
	for(long long i=1;i<=m;i++){
		cin>>x>>y;
		b[x][y]=1;
    }
	a[1][1]=1;
	for(long long i=1;i<=n;i++){
		for(long long j=1;j<=n;j++){
			a[i][j]+=a[i-1][j]+a[i][j-1];
			if(b[i][j]==1)
			a[i][j]=0;
			a[i][j]=a[i][j]%100003;
		}
	}
	cout<<a[n][n];
	return 0;
}