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>
using namespace std;
map <string,int> mp;
int pa[1100000],arr[1100000],arr2[1100000],st[1100000];
int root(int x)
{
if(pa[x]==x) return x;
else return pa[x] = root(pa[x]);
}
int main()
{
cin.tie(0)->sync_with_stdio(0);
int n;
int idx=1;
cin >> n;
for (int i=1;i<=n;i++){
string str;
int cnt=0;
cin >> str;
int len = str.size();
//cout << mp[str] << " ----\n";
if(mp[str]>0){
arr[i]=mp[str];
continue;
}
for (int j=0;j<len && cnt==0;j++){
//cout << str[j] << "\n";
if(isalpha(str[j])){
arr[i]=idx;
pa[idx]=idx;
mp[str]=idx;
st[idx++]=1;
cnt=1;
}
else{
arr[i]=idx;
pa[idx]=idx;
mp[str]=idx;
st[idx++]=0;
cnt=1;
}
}
}
for (int i=1;i<=n;i++){
string str;
int cnt=0;
cin >> str;
int len = str.size();
if(mp[str]>0){
arr2[i]=mp[str];
continue;
}
for (int j=0;j<len && cnt==0;j++){
if(isalpha(str[j])){
arr2[i]=idx;
pa[idx]=idx;
mp[str]=idx;
st[idx++]=1;
cnt=1;
}
else{
arr2[i]=idx;
pa[idx]=idx;
mp[str]=idx;
st[idx++]=0;
cnt=1;
}
}
}
for(int i=1;i<=n;i++){
int a=arr[i];
int b=arr2[i];
if(root(a)==root(b)) continue;
if(st[root(a)]==1 && st[root(b)]==1) continue;
if(root(a)!=root(b) && (st[root(b)]==1 || st[root(a)]==1)){
if (st[root(a)]==1) {
pa[root(a)]=root(b);
st[root(a)]=0;
}
else if(st[root(b)]==1){
pa[root(b)]=root(a);
st[root(b)]=0;
}
}
else if(root(a)!=root(b) && (st[root(b)]==0 && st[root(a)]==0)){
cout << "NE";
//return 0;
}
}
cout << "DA";
/*cout << '\n';
for (int i=1;i<=n;i++){
cout << pa[arr[i]] << " ";
}
cout << '\n';
for (int i=1;i<=n;i++){
cout << pa[arr2[i]] << " ";
}*/
return 0;
}
/*
4
4 5 iks ipasdasd
1 iks 3 iks
3
5 iks ipasdasd
iks 3 iks
5
x 3 x y 3
x y 2 z 3
*/
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