#include<bits/stdc++.h>
using namespace std;
const int mod=1e9+7;
int n,ans;
char a[5005];
int id[5005];
int pos[5005];
vector<int>g[5005];
bool cmp(int i,int j) {
	return g[i].size()>g[j].size();
}
int p[25000005]= {1};
int sum[5005],s[5005];
long long get(int i,int j) {
	if(i<j)swap(i,j);
	return p[(i-2)*(i-1)/2+j-1];
}
int cnt=1,l[5005],r[5005],b[5005],len[5005];
void calc(int l,int r) {
	for(int i=l; i<r; i++) {
		s[i+1]=s[i]+(sum[i]+1==i*(n-i));
	}
	for(int i=l; i<=r; i++) {
		for(int x:g[id[i]]) {
			int j=pos[x];
			if(j>r) {
				if(b[i]+1==b[j]&&len[b[i]]==1&&len[b[j]]==1) {
					ans=(ans+get(id[i],x)*cnt%mod)%mod;
				} else {
					ans=(ans+get(id[i],x)*(cnt+b[i]-b[j])%mod)%mod;
				}
			}
			if(j<l||j>r)continue;
			if(j>i)ans=(ans+get(id[i],x)*cnt%mod)%mod;
			else ans=(ans+get(id[i],x)*(cnt+s[i]-s[j])%mod)%mod;
		}
	}
}
int main() {
	scanf("%d",&n);
	for(int i=1; i<=n*n; i++) {
		p[i]=p[i-1]*2%mod;
	}
	for(int i=2; i<=n; i++) {
		scanf("\n%s",a);
		int m=strlen(a);
		for(int j=0; j<m; j++) {
			int x=(a[j]>='0'&&a[j]<='9'?a[j]-'0':a[j]-'A'+10);
			for(int k=1; k<=4&&j*4+k<i; k++) {
				if(x&1) {
					g[i].push_back(j*4+k);
				} else {
					g[j*4+k].push_back(i);
				}
				x>>=1;
			}
		}
	}
	for(int i=1; i<=n; i++)id[i]=i;
	sort(id+1,id+1+n,cmp);
	int last=0;
	for(int i=1; i<=n; i++) {
		b[i]=cnt;
		pos[id[i]]=i;
		sum[i]=sum[i-1]+g[id[i]].size()-i+1;
		if(sum[i]==i*(n-i)) {
			len[cnt]=i-last;
			l[cnt]=last+1;
			r[cnt]=i;
			cnt++;
			last=i;
		}
	}
	cnt--;
	for(int i=1; i<=cnt; i++) {
		calc(l[i],r[i]);
	}
	printf("%d",ans);
	return 0;
}

answer.code: In function ‘int main()’:
answer.code:40:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   40 |         scanf("%d",&n);
      |         ~~~~~^~~~~~~~~
answer.code:45:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   45 |                 scanf("\n%s",a);
      |                 ~~~~~^~~~~~~~~~
/tmp/cc7l2SkD.s: Assembler messages:
/tmp/cc7l2SkD.s: Fatal error: can't write 50 bytes to section .text of /tmp/ccvMXggD.o: 'File too large'
/tmp/cc7l2SkD.s: Fatal error: can't close /tmp/ccvMXggD.o: File too large