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C.cpp
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C.cpp
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#include<bits/stdc++.h>
using namespace std;
#define fastio ios_base::sync_with_stdio(false);cin.tie(NULL)
long long ara[10005][15];
int main()
{
fastio;
int n,m,i,j,flag=0;
cin>>n>>m;
for(i=0;i<n;i++)
{
for(j=0;j<m;j++)
cin>>ara[i][j];
}
for(i=0;i<n;i++)
{
for(j=0;j<m;j++)
{
if(i==0)
{
if(ara[i][j]%7==0 && j!=m-1)
{
flag=1;
break;
}
if(j==m-1)
continue;
if((ara[i][j+1]-ara[i][j])!=1)
{
flag=1;
break;
}
}
else if(ara[i][j]-ara[i-1][j]!=7)
{
flag=1;
break;
}
}
if(flag==1)
break;
}
if(flag==0)
cout<<"Yes"<<"\n";
else
cout<<"No"<<"\n";
return 0;
}