#include <stdio.h>
int find_pattern(int *mem, int n) {
// Write your pointer-based logic here
int count = 0,index = 0,i=0;
for(i=0;i<n;i++){ // run loop n times
if(*(mem+i) == *(mem+i+1)-1){ // checking the present value and next value -1 is equal to or not
count++; // if same increment count
if(count == 1) // if count is 1 store the i value in index
index = i;
if(count == 2){ // we found here 3 consecutive numbers
return index; // return index
}
} else // else make count zero
count = 0;
}
return -1; // if nothing found 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;
}
int find_pattern(int *mem, int n) {
// Write your pointer-based logic here
int count = 0,index = 0,i=0;
for(i=0;i<n;i++){ // run loop n times
if(*(mem+i) == *(mem+i+1)-1){ // checking the present value and next value -1 is equal to or not
count++; // if same increment count
if(count == 1) // if count is 1 store the i value in index
index = i;
if(count == 2){ // we found here 3 consecutive numbers
return index; // return index
}
} else // else make count zero
count = 0;
}
return -1; // if nothing found return -1
}
Input
8 2 4 5 6 9 11 12 14
Expected Output
1