MAKETREE - Hierarchy

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A group of graduated students decided to establish a company; however, they don't agree on who is going to be who's boss.

Generally, one of the students will be the main boss, and each of the other students will have exactly one boss (and that boss, if he is not the main boss, will have a boss of his own too). Every boss will have a strictly greater salary than all of his subordinates - therefore, there are no cycles. Therefore, the hierarchy of the company can be represented as a rooted tree.

In order to agree on who is going to be who's boss, they've chosen K most successful students, and each of them has given a statement: I want to be the superior of him, him, and him (they could be successful or unsuccessful). And what does it mean to be a superior? It means to be the boss, or to be one of the boss' superiors (therefore, a superior of a student is not necessary his direct boss).

Help this immature company and create a hierarchy that will satisfy all of the successful students' wishes. A solution, not necessary unique, will exist in all of the test data.


In the first line of input, read positive integers N (N ≤ 100 000), total number of students, and K (K < N), the number of successful students. All students are numbered 1..N, while the successful ones are numbered 1..K.

Then follow K lines. In Ath of these lines, first read an integer W (the number of wishes of the student A, 1 ≤ W ≤ 10), and then W integers from the range [1, N] which denote students which student A wants to be superior to.


Output N integers. The Ath of these integers should be 0 if student A is the main boss, and else it should represent the boss of the student A.


4 2
1 3
2 3 4
7 4
2 2 3
1 6
1 7
2 1 2

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parbays: 2014-01-22 19:14:16

Phew...wasted my time, where mistakenly a cout n times was causing TLE.

Bharat Jain: 2013-07-20 18:36:47

any more test case ??

Pranay: 2012-10-29 05:58:32

@Adrian : Could you please tell why WA (id: 7953672) ? Also Can't there be 2 main bosses ? E.g for case 1 , can't the answer be 0 0 2 2 ?

Last edit: 2012-10-29 07:01:37
Adrian Satja Kurdija: 2012-02-20 09:10:29

Print any solution.

sharad: 2012-02-17 03:27:53

there are many answer for a question how to answer specific one?

Adrian Satja Kurdija: 2011-09-14 09:34:28


Added by:Adrian Satja Kurdija
Time limit:1s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All except: ASM64
Resource:own problem