RoAlgo Contest #4 (incepatori) | cenzura

Given $N$ and $a_1 \ a_2 \ \dots \ a_N$. You are given $Q$ queries of the form $l$, $r$. For the $i$-th query, you will choose the numbers $l$ and $r$ ($1 \leq l \leq r \leq N$) and you want to know what the maximum of the array would be and how many times it would appear in the array if the subarray $[l..r]$ were censored.

• The subarray $[l..r]$ of an array is the sequence $a_l \ a_{l+1} \ a_{l+2} \dots a_r$.
• By censoring a subarray $[l..r]$, we mean replacing $a_i$ with $0$ for every $l \leq i \leq r$. For example, if we censor the subarray $[2..4]$ of the array $[1, 2, 3, 4, 5, 6, 7]$, we get the array $[1, 0, 0, 0, 5, 6, 7]$.

Input data

The first line contains two integers, $N$ and $Q$.

The second line contains an array of $N$ natural numbers, representing the array $a$.

The next $Q$ lines each contain a pair of numbers $l$, $r$.

Output data

The answers to the queries will be printed on $Q$ lines. The $i$-th line will contain two numbers, representing the answer to the $i$-th query.

Constraints and clarifications

• $1 \leq N, Q \leq 10^6$
• $1 \leq a_i \leq 10^9$
• For $44$ points, $N, Q \leq 5 \ 000$

Example 1

stdin

9 6
3 2 3 1 6 7 5 7 7
1 2
1 3
3 6
6 9
1 9
2 8

stdout

7 3
7 3
7 2
6 1
0 9
7 1

Explanation

$N = 9$, $Q = 6$, and $a = [3, 2, 3, 1, 6, 7, 5, 7, 7]$.

For the first query, if we censor the subarray ($1$, $2$), the resulting array is $[0, 0, 3, 1, 6, 7, 5, 7, 7]$, with the maximum being $7$ and appearing $3$ times.

For the third query, if we censor the subarray ($3$, $6$), the resulting array is $[3, 2, 0, 0, 0, 0, 5, 7, 7]$, with the maximum being $7$ and appearing $2$ times.

For the fourth query, if we censor the subarray ($6$, $9$), the resulting array is $[3, 2, 3, 1, 6, 0, 0, 0, 0]$, with the maximum being $6$ and appearing once.

For the fifth query, if we censor the subarray ($1$, $9$), the resulting array is $[0, 0, 0, 0, 0, 0, 0, 0, 0]$, with the maximum being $0$ and appearing $9$ times.