#include <stdio.h>

int getSum(int arr[], int n) {
    int sum = 0;
    for (int i = 0; i < n; i++)
        sum += arr[i];
    return sum;
}

void findTwoMissingNumbers(int arr[], int n) {
    int sum = (n * (n + 1)) / 2 - getSum(arr, n - 2);
    int avg = sum / 2;
    int sumSmallerHalf = 0, sumGreaterHalf = 0;

    for (int i = 0; i < n - 2; i++) {
        if (arr[i] <= avg)
            sumSmallerHalf += arr[i];
        else
            sumGreaterHalf += arr[i];
    }

    int firstMissing = (avg * (avg + 1)) / 2 - sumSmallerHalf;
    int secondMissing = sum - firstMissing;

    printf("Two Missing Numbers are: %d %d\n", firstMissing, secondMissing);
}

int main() {
    int arr[] = {1, 3, 5, 6}; // Example array
    int n = sizeof(arr) / sizeof(arr[0]) + 2;
    findTwoMissingNumbers(arr, n);
    return 0;
}