cannot find any error but 2 test cases from 9 are failing
import java.util.Scanner;
public class Increasing_Decreasing_Sequence {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int n = scan.nextInt();
int[] a;
a = new int[n];
for (int i = 0; i < n; i++) {
a[i] = scan.nextInt();
}
if (a[1] >= a[0]) {
for (int i = 1; i < n - 1; i++) {
if (a[i] == a[i - 1]) {
System.out.println("false");
return;
}
if (a[i] < a[i - 1]) {
if (a[i] < a[i + 1]) {
System.out.println("false");
return;
}
}
}
} else {
for (int i = 1; i < n - 1; i++) {
if (a[i] == a[i - 1]) {
System.out.println("false");
return;
}
if (a[i] > a[i - 1]) {
if (a[i] > a[i + 1]) {
System.out.println("false");
return;
}
}
}
}
if (a[n - 1] == a[n - 2]) {
System.out.println("false");
} else
System.out.println("true");
}
}