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2162.java
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import java.io.IOException;
import java.util.Locale;
import java.util.Scanner;
/*
*
*/
public class Main {
public static void main(String[] args) throws IOException {
Scanner sc = new Scanner(System.in);
Locale.setDefault(Locale.US);
int n, i, conta = 1;
n = sc.nextInt();
int vetor[] = new int[n];
for (i = 0; i < n; i++) {
vetor[i] = sc.nextInt();
if (n == 2 && vetor[0] == vetor[1]) {
conta = 0;
}else{
for (i = 2; i < n; i++) {
if (vetor[i] >= vetor[i - 1] && vetor[i - 1] >= vetor[i - 2]) {
conta = 0;
break;
} else if (vetor[i] <= vetor[i - 1] && vetor[i - 1] <= vetor[i - 2]) {
conta = 0;
break;
}
}
}
}
if (conta == 1) {
System.out.println("1");
}
if (conta != 1) {
System.out.println("0");
}
sc.close();
}
}