不知道为什么我写的C会WA

罚时吃7发

有人能帮我看看吗

必有重谢！

#include<bits/stdc++.h>
#define int long long 
using namespace std;
const int N=1e4+5;
int a[N][10];
inline int read()
{
	int x=0;
	bool w=0;
	char c=getchar();
	while(!isdigit(c))
		w|=c=='-',c=getchar();
	while(isdigit(c))
		x=(x<<1)+(x<<3)+(c^48),c=getchar();
	return w?-x:x;
}
signed main()
{
//	freopen(".in","r",stdin);
//	freopen(".out","w",stdout);
	int n,m;cin>>n>>m;
	for(register int i=1;i<=n;++i)
		for(register int j=1;j<=m;++j)
			cin>>a[i][j];
	for(register int i=1;i<=n;++i)
		for(register int j=1;j<=m;++j){
			if(i!=1 && a[i][j]-a[i-1][j]!=7){
				cout<<"No";return 0;
			}
			if(j!=1 && a[i][j]-a[i][j-1]!=1){
				cout<<"No";return 0;
			}
		}
	cout<<"Yes";
	return 0;
}