59. Scan Memory for Three Consecutive Increasing Values

#include <stdio.h>

int find_pattern(int *mem, int n) {
    int c = 0;
    for (int i = 0; i < n - 1; i++){
        if (*(mem + i) + 1 == *(mem + i + 1)) c++;
        else c = 0;
        if (c > 1) return i - 1;
    }
    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;
}