bzoj#P2529. [POI2011] Sticks

[POI2011] Sticks

Description

Little Johnny was given a birthday present by his grandparents.

This present is a box of sticks of various lengths and colours.

Johnny wonders if there are three sticks in the set he has been given that would form a triangle with different-coloured sides.

Let us note that Johnny is interested in non-degenerate triangles only, i.e., those with positive area.

Input

In the first line of the standard input an integer kk (3k503\le k\le 50) is given, which is the number of different colours of sticks.

The colours themselves are numbered from 11 to kk.

The following kk lines contain descriptions of the sticks of particular colours.

The line no. i+1i+1 holds integers that describe the sticks of colour ii,separated by single spaces.

The first of these numbers, nin_i (1ni1 000 0001\le n_i\le 1\ 000\ 000), denotes the number of sticks of colour ii.

It is followed, in the same line, by nin_i integers denoting the lengths of the sticks of colour ii.All lengths are positive and do not exceed 1 000 000 0001\ 000\ 000\ 000.Furthermore, the total number of all sticks does not exceed 1 000 0001\ 000\ 000.

Output

Your program should print (on the first and only line of the standard output) either:

six integers, separated by single spaces, that describe the construction of a triangle with different-coloured sides as follows:

the colour and the length of the first stick, the colour and the length of the second stick, and the colour and the length of the third stick, or the word NIE (Polish for no) if no such triple of sticks exists.

If there are multiple triples of different-coloured sticks that give rise to a triangle, your program may pick one such triple arbitrarily.

4
1 42
2 6 9
3 8 4 8
1 12
3 8 4 12 2 9

Source

Thanks to Kac.