59. Scan Memory for Three Consecutive Increasing Values

#include <stdio.h>

int find_pattern(int *mem, int n) {
   for (int *p = mem, count = 0; p < mem + n - 1; ++p) {
        count = (*(p + 1) - *p == 1) ? count + 1 : 0;
        if (count == 2)
            return (p + 1 - count) - mem;
    }
    return -1;
}

int main() {
    int n, arr[100];
    scanf("%d", &n);

    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }

    int res = find_pattern(arr, n);
    printf("%d", res);

    return 0;
}