Fişierul intrare/ieş, winetasting.outSursăIIOT 2021-22 Runda 3
AutorGiorgio AudritoAdăugată destefdascalescuStefan Dascalescu stefdascalescu
Timp execuţie pe test0.8 secLimită de memorie65536 kbytes
Scorul tăuN/ADificultateN/A

Vezi solutiile trimise | Statistici

Wine Tasting

There are N vineyards arranged in a row, numbered from 0 to N-1. Giorgio starts the tour from vineyard L, once the first tasting is over he will move on to the vineyard L+1, then to the vineyard L+2 and so on until he reaches the vineyard R. Note that Giorgio can start and end his tour on the same vineyard.

To visit the vineyard i Giorgio has to pay V[i] euro. The cost of a tour is the cost of each vineyard visited.

There are a total of N*(N+1)/2 different tours, Giorgio will choose one of the tours in the following way:

First, he sorts the tours in ascending order of cost, in case of a tie, the tours with the smallest starting vineyard come first. Then, he chose the K-th tour from this order.

Help Giorgio find the first and the last vineyards of the K-th tour!

Date de intrare

The first line of the input file contains the integers N and K. The second line contains N integers V[i].

Date de ieşire

The output file winetasting.out contains a single line which has the integers L and R: the first and the last vineyards of Giorgio's tour.


  • 1 ≤ N ≤ 2*10^5
  • 1 ≤ K ≤ N*(N+1)/2
  • 1 ≤ v[i] ≤ 10^9
  • For tests worth 50 points, V[i] = 1 for all values in the input.
  • For tests worth 20 more points, 1 ≤ N ≤ 1000.


4 4
1 2 3 1
0 1
6 18
1 2 1 2 1 2
2 5


In the first sample case there are 10 possible tours, in order:

from 0 to 0: the cost is 1
from 3 to 3: the cost is 1
from 1 to 1: the cost is 2
from 0 to 1: the cost is 1+2=3
from 2 to 2: the cost is 3
from 2 to 3: the cost is 3+1=4
from 1 to 2: the cost is 2+3=5
from 0 to 2: the cost is 1+2+3=6
from 1 to 3: the cost is 2+3+1=6
from 0 to 3: the cost is 1+2+3+1=7

The fourth tour starts from vineyard 0 and end in vineyard 1.

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