Sunset

input/code.cpp: In function 'int main()':
input/code.cpp:10:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&n,&q);
  ~~~~~^~~~~~~~~~~~~~~
input/code.cpp:11:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1; i<=n; i++) scanf("%d",&a[i]);
                          ~~~~~^~~~~~~~~~~~
input/code.cpp:26:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int l, r; scanf("%d %d",&l,&r);
             ~~~~~^~~~~~~~~~~~~~~

#include<bits/stdc++.h>
using namespace std;
const int MAXN = 500005;
using lint = long long;

int n, q, a[MAXN];
int nxt[20][MAXN];

int main(){
	scanf("%d %d",&n,&q);
	for(int i=1; i<=n; i++) scanf("%d",&a[i]);
	vector<int> stk = {n + 1};
	a[n + 1] = 2e9;
	nxt[0][n+1] = n+1;
	for(int i=n; i; i--){
		while(!stk.empty() && a[stk.back()] <= a[i]){
			stk.pop_back();
		}
		nxt[0][i] = stk.back();
		stk.push_back(i);
	}
	for(int i=1; i<20; i++){
		for(int j=1; j<=n+1; j++) nxt[i][j] = nxt[i-1][nxt[i-1][j]];
	}
	while(q--){
		int l, r; scanf("%d %d",&l,&r);
		int cnt = 0;
		for(int i=19; i>=0; i--){
			if(nxt[i][l] <= r){
				cnt += (1<<i);
				l = nxt[i][l];
			}
		}
		cnt++;
		printf("%d\n", cnt);
	}
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 1

Verdict: ACCEPTED

Test 7

Group: 1

Verdict: ACCEPTED

Test 8

Group: 1

Verdict: ACCEPTED

Test 9

Group: 1

Verdict: ACCEPTED

Test 10

Group: 1

Verdict: ACCEPTED

Test 11

Group: 1

Verdict: ACCEPTED

Test 12

Group: 1

Verdict: ACCEPTED

Test 13

Group: 1

Verdict: ACCEPTED

Test 14

Group: 1

Verdict: ACCEPTED

Test 15

Group: 1

Verdict: ACCEPTED

Test 16

Group: 1

Verdict: ACCEPTED

Test 17

Group: 1

Verdict: ACCEPTED

Test 18

Group: 2

Verdict: ACCEPTED

Test 19

Group: 2

Verdict: ACCEPTED

Test 20

Group: 2

Verdict: ACCEPTED

Test 21

Group: 2

Verdict: ACCEPTED

Test 22

Group: 2

Verdict: ACCEPTED

Test 23

Group: 2

Verdict: ACCEPTED

Test 24

Group: 2

Verdict: ACCEPTED

Test 25

Group: 2

Verdict: ACCEPTED

Test 26

Group: 2

Verdict: ACCEPTED

Test 27

Group: 2

Verdict: ACCEPTED

Test 28

Group: 2

Verdict: ACCEPTED

Test 29

Group: 2

Verdict: ACCEPTED

Test 30

Group: 2

Verdict: ACCEPTED

Test 31

Group: 2

Verdict: ACCEPTED

Test 32

Group: 3

Verdict: ACCEPTED

Test 33

Group: 3

Verdict: ACCEPTED

Test 34

Group: 3

Verdict: ACCEPTED

Test 35

Group: 3

Verdict: ACCEPTED

Test 36

Group: 3

Verdict: ACCEPTED

Test 37

Group: 3

Verdict: ACCEPTED

Test 38

Group: 3

Verdict: ACCEPTED

Test 39

Group: 3

Verdict: ACCEPTED

Test 40

Group: 3

Verdict: ACCEPTED

Test 41

Group: 3

Verdict: ACCEPTED

Test 42

Group: 3

Verdict: ACCEPTED

Test 43

Group: 3

Verdict: ACCEPTED

Test 44

Group: 3

Verdict: ACCEPTED

Test 45

Group: 3

Verdict: ACCEPTED

Test 46

Group: 3

Verdict: ACCEPTED

Test 47

Group: 3

Verdict: ACCEPTED

Test 48

Group: 3

Verdict: ACCEPTED

Test 49

Group: 3

Verdict: ACCEPTED

Test 50

Group: 3

Verdict: ACCEPTED

Test 51

Group: 3

Verdict: ACCEPTED

Test 52

Group: 3

Verdict: ACCEPTED

Test 53

Group: 3

Verdict: ACCEPTED

Test 54

Group: 3

Verdict: ACCEPTED