This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#include<unordered_map>
using namespace std;
#define ll long long
#define endl "\n"
#define Sara ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
const long long mod=998244353;
const double PI=acos(-1);
map<string,bool>vs;
ll cntd=0,cnta=0;
map<string,vector<string>>mp;
set<string>st;
void dfs(string node)
{
vs[node]=1;
if(isdigit(node[0]))
st.insert(node);
for(auto i:mp[node])
{
if(!vs[i])
{
dfs(i);
}
}
}
int main()
{
//freopen("input.in","r",stdin);
Sara
int n;
cin>>n;
vector<string>a(n),b(n);
bool valid=1;
for(int i=0; i<n; i++)
{
cin>>a[i];
}
for(int i=0; i<n; i++)
{
cin>>b[i];
}
for(int i=0; i<n; i++)
{
mp[a[i]].push_back(b[i]);
mp[b[i]].push_back(a[i]);
}
for(int i=0; i<n; i++)
{
dfs(a[i]);
if(st.size()>1){
valid=0;
break;
}
st.clear();
}
if(!valid)
cout<<"NE"<<endl;
else
cout<<"DA"<<endl;
return 0;
}
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