답안 #78671 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
78671	2018-10-07T02:19:34 Z	thebes	세 명의 친구들 (BOI14_friends)	C++14	100 / 100	166 ms	38732 KB

friends

#include <bits/stdc++.h>
using namespace std;

const int MN = 2e6+6;
int h[MN], pw[MN]={1}, N, L, i, cnt;
string s, ans; set<int> lol;
int hsh(int l,int r){return h[r]-h[l-1]*pw[r-l+1];}
int main(){
    cin >> N >> s;
    for(i=1;i<=N;i++){
        h[i]=h[i-1]*131+s[i-1]-'A';
        pw[i]=pw[i-1]*131;
    }
    if(N%2){
        L = N/2;
        for(i=1;i<=N;i++){
            if(i<L+1){
                int l1 = i-1;
                int h1 = hsh(1,l1)*pw[L-l1]+hsh(i+1,i+L-l1);
                int h2 = hsh(N-L+1,N);
                if(h1==h2){
                    cnt++; lol.insert(hsh(N-L+1,N));
                    if(cnt == 1){
                        for(int j=N-L+1;j<=N;j++)
                            ans.push_back(s[j-1]);
                    }
                }
            }
            else if(i>L+1){
                int h1 = hsh(1,L);
                int h2 = hsh(L+1,i-1)*pw[N-i]+hsh(i+1,N);
                if(h1==h2){
                    cnt++; lol.insert(hsh(1,L));
                    if(cnt == 1){
                        for(int j=1;j<=L;j++)
                            ans.push_back(s[j-1]);
                    }
                }
            }
            else{
                if(hsh(1,i-1)==hsh(i+1,N)){
                    cnt++; lol.insert(hsh(1,L));
                    if(cnt == 1){
                        for(int j=1;j<=L;j++)
                            ans.push_back(s[j-1]);
                    }
                }
            }
        }
        if(cnt==0) printf("NOT POSSIBLE\n");
        else if(lol.size()>1) printf("NOT UNIQUE\n");
        else printf("%s\n",ans.c_str());
    }
    else printf("NOT POSSIBLE\n");
    return 0;
}

Subtask #1
35.0 / 35.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	504 KB	Output is correct
2	Correct	2 ms	512 KB	Output is correct
3	Correct	2 ms	640 KB	Output is correct
4	Correct	2 ms	640 KB	Output is correct
5	Correct	2 ms	660 KB	Output is correct
6	Correct	2 ms	712 KB	Output is correct
7	Correct	2 ms	720 KB	Output is correct
8	Correct	2 ms	720 KB	Output is correct
9	Correct	2 ms	940 KB	Output is correct
10	Correct	2 ms	948 KB	Output is correct
11	Correct	2 ms	948 KB	Output is correct
12	Correct	2 ms	948 KB	Output is correct
13	Correct	2 ms	948 KB	Output is correct
14	Correct	2 ms	948 KB	Output is correct
15	Correct	2 ms	948 KB	Output is correct
16	Correct	2 ms	948 KB	Output is correct
17	Correct	2 ms	948 KB	Output is correct
18	Correct	2 ms	948 KB	Output is correct
19	Correct	2 ms	948 KB	Output is correct
20	Correct	2 ms	948 KB	Output is correct
21	Correct	2 ms	948 KB	Output is correct
22	Correct	2 ms	1060 KB	Output is correct
23	Correct	2 ms	1060 KB	Output is correct
24	Correct	2 ms	1060 KB	Output is correct
25	Correct	2 ms	1060 KB	Output is correct
26	Correct	2 ms	1060 KB	Output is correct
27	Correct	2 ms	1060 KB	Output is correct
28	Correct	2 ms	1096 KB	Output is correct
29	Correct	2 ms	1096 KB	Output is correct
30	Correct	2 ms	1096 KB	Output is correct
31	Correct	2 ms	1096 KB	Output is correct
32	Correct	2 ms	1096 KB	Output is correct
33	Correct	2 ms	1096 KB	Output is correct
34	Correct	2 ms	1096 KB	Output is correct
35	Correct	2 ms	1096 KB	Output is correct
36	Correct	2 ms	1096 KB	Output is correct
37	Correct	2 ms	1096 KB	Output is correct
38	Correct	2 ms	1096 KB	Output is correct
39	Correct	2 ms	1096 KB	Output is correct
40	Correct	2 ms	1096 KB	Output is correct
41	Correct	2 ms	1096 KB	Output is correct
42	Correct	2 ms	1096 KB	Output is correct
43	Correct	2 ms	1096 KB	Output is correct
44	Correct	2 ms	1096 KB	Output is correct
45	Correct	4 ms	1096 KB	Output is correct
46	Correct	2 ms	1096 KB	Output is correct
47	Correct	2 ms	1096 KB	Output is correct
48	Correct	2 ms	1096 KB	Output is correct
49	Correct	2 ms	1096 KB	Output is correct
50	Correct	2 ms	1096 KB	Output is correct
51	Correct	2 ms	1164 KB	Output is correct
52	Correct	2 ms	1164 KB	Output is correct
53	Correct	2 ms	1164 KB	Output is correct
54	Correct	2 ms	1164 KB	Output is correct

Subtask #2
65.0 / 65.0

#	결과	실행 시간	메모리	Grader output
1	Correct	116 ms	24548 KB	Output is correct
2	Correct	112 ms	26476 KB	Output is correct
3	Correct	113 ms	28492 KB	Output is correct
4	Correct	116 ms	30376 KB	Output is correct
5	Correct	112 ms	32312 KB	Output is correct
6	Correct	98 ms	32312 KB	Output is correct
7	Correct	166 ms	36284 KB	Output is correct
8	Correct	97 ms	36284 KB	Output is correct
9	Correct	102 ms	36828 KB	Output is correct
10	Correct	104 ms	38732 KB	Output is correct
11	Correct	88 ms	38732 KB	Output is correct
12	Correct	2 ms	38732 KB	Output is correct
13	Correct	2 ms	38732 KB	Output is correct
14	Correct	2 ms	38732 KB	Output is correct
15	Correct	2 ms	38732 KB	Output is correct
16	Correct	2 ms	38732 KB	Output is correct
17	Correct	2 ms	38732 KB	Output is correct
18	Correct	2 ms	38732 KB	Output is correct
19	Correct	2 ms	38732 KB	Output is correct
20	Correct	2 ms	38732 KB	Output is correct
21	Correct	2 ms	38732 KB	Output is correct
22	Correct	2 ms	38732 KB	Output is correct
23	Correct	2 ms	38732 KB	Output is correct
24	Correct	2 ms	38732 KB	Output is correct
25	Correct	2 ms	38732 KB	Output is correct
26	Correct	2 ms	38732 KB	Output is correct
27	Correct	2 ms	38732 KB	Output is correct
28	Correct	2 ms	38732 KB	Output is correct
29	Correct	2 ms	38732 KB	Output is correct
30	Correct	2 ms	38732 KB	Output is correct
31	Correct	3 ms	38732 KB	Output is correct
32	Correct	2 ms	38732 KB	Output is correct
33	Correct	2 ms	38732 KB	Output is correct
34	Correct	2 ms	38732 KB	Output is correct
35	Correct	2 ms	38732 KB	Output is correct
36	Correct	2 ms	38732 KB	Output is correct
37	Correct	2 ms	38732 KB	Output is correct
38	Correct	2 ms	38732 KB	Output is correct
39	Correct	2 ms	38732 KB	Output is correct
40	Correct	3 ms	38732 KB	Output is correct
41	Correct	2 ms	38732 KB	Output is correct
42	Correct	2 ms	38732 KB	Output is correct
43	Correct	2 ms	38732 KB	Output is correct
44	Correct	2 ms	38732 KB	Output is correct
45	Correct	2 ms	38732 KB	Output is correct
46	Correct	2 ms	38732 KB	Output is correct
47	Correct	2 ms	38732 KB	Output is correct
48	Correct	2 ms	38732 KB	Output is correct
49	Correct	2 ms	38732 KB	Output is correct
50	Correct	2 ms	38732 KB	Output is correct
51	Correct	2 ms	38732 KB	Output is correct
52	Correct	2 ms	38732 KB	Output is correct
53	Correct	2 ms	38732 KB	Output is correct
54	Correct	2 ms	38732 KB	Output is correct

답안 #78671

Compilation message

Subtask #1 35.0 / 35.0

Subtask #2 65.0 / 65.0

Subtask #1
35.0 / 35.0

Subtask #2
65.0 / 65.0