Help me in solving DSAAGP08 problem

My issue

what is wrong in this code?

My code

#include <bits/stdc++.h>

using namespace std;

int main() {
    int arr[100] = {
        2,
        4,
        6,
        8,
        10
    }; // Initial array
    int size = 5; // Current size of the array

    int positionToDelete = 2; // Index of the element to delete
    for (int i = size - 1; i >= positionToDelete; i--) {

        arr[i+1] = arr[i];
    }
    // Update the size of the array
    size--;

    // Print the updated array
    for (int i = 0; i < size; i++) {
        cout << arr[i] << " ";
    }

    return 0;
}

Learning course: Data structures & Algorithms lab
Problem Link: https://www.codechef.com/learn/course/muj-aiml-dsa-c/MUJADSAC05/problems/DSAAGP08