59. Scan Memory for Three Consecutive Increasing Values

#include <stdio.h>

int find_pattern(int *mem, int n) {
    int count = 1;
    int curr, prev = *mem++;
    for (int i = 1; i < n; i++) {
        if (count == 3) return i-3;
        curr = *mem++;
        if (curr == prev+1) {
            count++;
        } else {
            count = 1;
        }
        prev = curr;
    }
    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;
}