#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

int tstSeq(FILE* f);

int main() {
    FILE* in = fopen("input.txt", "r");
    if (in == NULL) {
        perror("Could not open input file");
        return (-1);
    }

    int res = tstSeq(in);
    fclose(in);

    FILE* out = fopen("output.txt", "w");
    if (in == NULL) {
        perror("Could not open output file");
        return (-1);
    }

    fprintf(out, "%d\n", res);
    fclose(out);
    return 0;
}

int tstSeq(FILE* f) {
    int ascending = 0;
    int len = 0;
    double last = 0.;   // Actually, the initial value is not used
    int a;
    while (fscanf(f, "%d", &a) == 1) {
        if (len > 0) {
            if (ascending > 0) {
                if (a <= last) {
                    ascending = 0; break;
                }
            } else if (ascending < 0) {
                if (a >= last) {
                    ascending = 0; break;
                }
            } else {
                assert(ascending == 0 && len == 1);
                // The second element
                if (a > last)
                    ascending = 1;
                else if (a < last)
                    ascending = (-1);
                else
                    break;      // first 2 elements are equal
            }
        }
        last = a;
        ++len;
    }
    return ascending;
}