#include <bits/stdc++.h>
using namespace std;
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
int n,m,b[200005],a[200005],k,flag,t,mpp[50],one,cev;
char c;
string s,ss,yaz,s1,s2;
vector<int> v;
int main(void){
fio();
cin>>n>>s;
if(n%2==0){cout<<"NOT POSSIBLE\n";return 0;}
for(int i=0;i<n;i++){
mpp[s[i]-'A']++;
}
for(int i=0;i<=25;i++){
if(mpp[i]%2){
cev++;
c=i+'A';
}
}
for(int i=0;i<n/2;i++)s1+=s[i];
for(int i=n/2+1;i<n;i++)s2+=s[i];
if(cev!=1){cout<<"NOT POSSIBLE\n";return 0;}
int bas=0;
int son=n/2;
cev=0;
while(son<n){
if(s[bas]!=s[son] && s[son]==c && flag==0){
son++;
flag=1;
}
else if(s[bas]!=s[son]){flag=2;break;}
else{bas++;son++;}
}
if(flag!=2){
cev++;
one=1;
}
flag=0;
bas=n/2;
son=n-1;
if(s1!=s2){
while(bas>=0){
//~ cout<<s[bas]<<" ;; "<<s[son]<<endl;
if(s[bas]!=s[son] && s[bas]==c && flag==0){
bas--;
flag=1;
}
else if(s[bas]!=s[son]){flag=2;break;}
else{bas--;son--;}
}
if(flag!=2)cev++;
}
if(cev==2){cout<<"NOT UNIQUE\n";return 0;}
if(cev==0){cout<<"NOT POSSIBLE\n";return 0;}
if(one==1){
cout<<s1<<endl;
return 0;
}
cout<<s2<<endl;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
376 KB |
Output is correct |
| 2 |
Correct |
4 ms |
376 KB |
Output is correct |
| 3 |
Correct |
5 ms |
376 KB |
Output is correct |
| 4 |
Correct |
5 ms |
376 KB |
Output is correct |
| 5 |
Correct |
5 ms |
376 KB |
Output is correct |
| 6 |
Correct |
5 ms |
248 KB |
Output is correct |
| 7 |
Correct |
5 ms |
376 KB |
Output is correct |
| 8 |
Correct |
5 ms |
376 KB |
Output is correct |
| 9 |
Correct |
6 ms |
376 KB |
Output is correct |
| 10 |
Correct |
5 ms |
376 KB |
Output is correct |
| 11 |
Correct |
5 ms |
376 KB |
Output is correct |
| 12 |
Correct |
5 ms |
380 KB |
Output is correct |
| 13 |
Correct |
5 ms |
376 KB |
Output is correct |
| 14 |
Correct |
5 ms |
376 KB |
Output is correct |
| 15 |
Correct |
5 ms |
376 KB |
Output is correct |
| 16 |
Correct |
5 ms |
376 KB |
Output is correct |
| 17 |
Correct |
5 ms |
376 KB |
Output is correct |
| 18 |
Correct |
5 ms |
376 KB |
Output is correct |
| 19 |
Correct |
5 ms |
376 KB |
Output is correct |
| 20 |
Correct |
5 ms |
376 KB |
Output is correct |
| 21 |
Correct |
5 ms |
376 KB |
Output is correct |
| 22 |
Correct |
5 ms |
280 KB |
Output is correct |
| 23 |
Correct |
5 ms |
376 KB |
Output is correct |
| 24 |
Correct |
5 ms |
376 KB |
Output is correct |
| 25 |
Correct |
5 ms |
376 KB |
Output is correct |
| 26 |
Correct |
5 ms |
376 KB |
Output is correct |
| 27 |
Correct |
5 ms |
376 KB |
Output is correct |
| 28 |
Correct |
5 ms |
376 KB |
Output is correct |
| 29 |
Correct |
6 ms |
376 KB |
Output is correct |
| 30 |
Correct |
5 ms |
376 KB |
Output is correct |
| 31 |
Correct |
5 ms |
376 KB |
Output is correct |
| 32 |
Correct |
5 ms |
376 KB |
Output is correct |
| 33 |
Correct |
5 ms |
376 KB |
Output is correct |
| 34 |
Correct |
5 ms |
376 KB |
Output is correct |
| 35 |
Correct |
5 ms |
376 KB |
Output is correct |
| 36 |
Correct |
5 ms |
376 KB |
Output is correct |
| 37 |
Correct |
5 ms |
376 KB |
Output is correct |
| 38 |
Correct |
5 ms |
376 KB |
Output is correct |
| 39 |
Correct |
5 ms |
380 KB |
Output is correct |
| 40 |
Correct |
5 ms |
376 KB |
Output is correct |
| 41 |
Correct |
5 ms |
376 KB |
Output is correct |
| 42 |
Correct |
5 ms |
376 KB |
Output is correct |
| 43 |
Correct |
5 ms |
376 KB |
Output is correct |
| 44 |
Correct |
5 ms |
376 KB |
Output is correct |
| 45 |
Correct |
5 ms |
376 KB |
Output is correct |
| 46 |
Correct |
5 ms |
376 KB |
Output is correct |
| 47 |
Correct |
5 ms |
376 KB |
Output is correct |
| 48 |
Correct |
4 ms |
376 KB |
Output is correct |
| 49 |
Correct |
5 ms |
376 KB |
Output is correct |
| 50 |
Correct |
5 ms |
376 KB |
Output is correct |
| 51 |
Correct |
5 ms |
376 KB |
Output is correct |
| 52 |
Correct |
5 ms |
376 KB |
Output is correct |
| 53 |
Correct |
5 ms |
376 KB |
Output is correct |
| 54 |
Correct |
5 ms |
376 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
36 ms |
6164 KB |
Output is correct |
| 2 |
Correct |
37 ms |
6168 KB |
Output is correct |
| 3 |
Correct |
39 ms |
6212 KB |
Output is correct |
| 4 |
Correct |
35 ms |
6160 KB |
Output is correct |
| 5 |
Correct |
35 ms |
6164 KB |
Output is correct |
| 6 |
Correct |
9 ms |
2452 KB |
Output is correct |
| 7 |
Correct |
36 ms |
6164 KB |
Output is correct |
| 8 |
Correct |
32 ms |
6552 KB |
Output is correct |
| 9 |
Correct |
32 ms |
7448 KB |
Output is correct |
| 10 |
Correct |
33 ms |
7576 KB |
Output is correct |
| 11 |
Correct |
28 ms |
6168 KB |
Output is correct |
| 12 |
Correct |
5 ms |
376 KB |
Output is correct |
| 13 |
Correct |
5 ms |
376 KB |
Output is correct |
| 14 |
Correct |
5 ms |
376 KB |
Output is correct |
| 15 |
Correct |
5 ms |
376 KB |
Output is correct |
| 16 |
Correct |
5 ms |
376 KB |
Output is correct |
| 17 |
Correct |
5 ms |
376 KB |
Output is correct |
| 18 |
Correct |
5 ms |
376 KB |
Output is correct |
| 19 |
Correct |
5 ms |
376 KB |
Output is correct |
| 20 |
Correct |
5 ms |
376 KB |
Output is correct |
| 21 |
Correct |
5 ms |
376 KB |
Output is correct |
| 22 |
Correct |
5 ms |
376 KB |
Output is correct |
| 23 |
Correct |
5 ms |
376 KB |
Output is correct |
| 24 |
Correct |
5 ms |
376 KB |
Output is correct |
| 25 |
Correct |
5 ms |
376 KB |
Output is correct |
| 26 |
Correct |
5 ms |
376 KB |
Output is correct |
| 27 |
Correct |
5 ms |
376 KB |
Output is correct |
| 28 |
Correct |
5 ms |
376 KB |
Output is correct |
| 29 |
Correct |
5 ms |
376 KB |
Output is correct |
| 30 |
Correct |
5 ms |
376 KB |
Output is correct |
| 31 |
Correct |
5 ms |
376 KB |
Output is correct |
| 32 |
Correct |
5 ms |
376 KB |
Output is correct |
| 33 |
Correct |
5 ms |
376 KB |
Output is correct |
| 34 |
Correct |
5 ms |
376 KB |
Output is correct |
| 35 |
Correct |
5 ms |
376 KB |
Output is correct |
| 36 |
Correct |
5 ms |
380 KB |
Output is correct |
| 37 |
Correct |
5 ms |
376 KB |
Output is correct |
| 38 |
Correct |
5 ms |
372 KB |
Output is correct |
| 39 |
Correct |
5 ms |
376 KB |
Output is correct |
| 40 |
Correct |
5 ms |
376 KB |
Output is correct |
| 41 |
Correct |
5 ms |
376 KB |
Output is correct |
| 42 |
Correct |
5 ms |
376 KB |
Output is correct |
| 43 |
Correct |
5 ms |
376 KB |
Output is correct |
| 44 |
Correct |
5 ms |
376 KB |
Output is correct |
| 45 |
Correct |
5 ms |
376 KB |
Output is correct |
| 46 |
Correct |
5 ms |
376 KB |
Output is correct |
| 47 |
Correct |
5 ms |
376 KB |
Output is correct |
| 48 |
Correct |
5 ms |
380 KB |
Output is correct |
| 49 |
Correct |
5 ms |
376 KB |
Output is correct |
| 50 |
Correct |
5 ms |
376 KB |
Output is correct |
| 51 |
Correct |
5 ms |
380 KB |
Output is correct |
| 52 |
Correct |
5 ms |
376 KB |
Output is correct |
| 53 |
Correct |
5 ms |
248 KB |
Output is correct |
| 54 |
Correct |
4 ms |
376 KB |
Output is correct |
