#include<bits/stdc++.h>
using namespace std;
inline int read(){
    int s=0,w=1;char ch=getchar();
    for(;ch<'0'||ch>'9';ch=getchar())if(ch=='-')w=-w;
    for(;ch>='0'&&ch<='9';ch=getchar())s=s*10+ch-'0';
    return s*w;
}
inline void write(int x){
    if(x<0)x=-x,putchar('-');
    if(x>9)write(x/10);
    putchar(x%10+'0');
}
int n;
int a[2001][2001];
int way[6][2]={{0,0},{0,1},{1,0},{1,2},{2,1},{2,2}};
int main(){
	n=read();
	for(int i=1;i<=n;++i)for(int j=1;j<=i;++j){
		char ch;cin>>ch;a[i][j]=ch-'0';
	}
	for(int i=1;i<=n;++i){
		for(int j=1;j<=i;++j){
			int res=0;
			for(int k=0;k<6;++k){
				int tx=i+way[k][0],ty=j+way[k][1];
				if(tx<1||ty<1||tx>n||ty>i){
					res=0;break;
				}
				res^=a[tx][ty];
			}
			if(res){
				puts("No");
				exit(0);
			}
		}
	}
	puts("Yes");
	return 0;
}