This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std ;
using namespace __gnu_pbds;
#define int long long
#define endl '\n'
#define ordered_set tree<pair < int ,int >,null_type,less<pair < int ,int >>,rb_tree_tag,tree_order_statistics_node_update>
#define all(a) a.begin() , a.end()
#define alr(a) a.rbegin() , a.rend()
bool check(string x){
return(x[0] >= '0' && x[0] <= '9');
}
signed main(){
ios_base::sync_with_stdio(0), cin.tie(0),cout.tie(0);
int n ;
cin >> n ;
vector < string > a(n) , b(n);
map < string , string > mp ;
for( auto &i : a )
cin >> i;
for( auto &i : b )
cin >> i;
for( int i = 0 ; i < n ; i++ )
mp[a[i]] = mp[b[i]] = "inf";
for( int re = 0 ; re < 10 ; re++ ) {
for( int i = 0 ; i < n ; i++ ){
bool f1 = check(a[i]) , f2 = check(b[i]);
if( f1 && f2 ){
if(a[i] != b[i]) return cout << "NE" , 0;
}
else{
if(!f1 && !f2){
if(mp[a[i]] != "inf") a[i] = mp[a[i]];
if(mp[b[i]] != "inf") b[i] = mp[b[i]];
}
else {
if(mp[(f1 ? b[i] : a[i])] == "inf")
mp[(f1 ? b[i] : a[i])] = a[i] , (f1 ? b[i] : a[i]) = (f1 ? a[i] : b[i]);
else{
if(mp[(f1 ? b[i] : a[i])] != (f1 ? b[i] : b[i])) return cout << "NE" , 0;
else (f1 ? b[i] : a[i]) = (f1 ? a[i] : b[i]);
}
}
}
}
}
cout << (a == b? "DA" : "NE");
return 0 ;
}
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