#include <iostream>
using namespace std;

bool allocationIsPossible(int arr[], int n, int m, int mid) {
    int sum = 0;
    int studentCount = 1;
    for (int i = 0; i < n; i++) {
        if (sum + arr[i] <= mid) {
            sum += arr[i];
        } else {
            studentCount++;
            if (studentCount > m || arr[i] > mid) {
                return false;
            }
            sum = arr[i];
        }
    }
    return true;
}

int bookAllocate(int arr[], int n, int m) {
    int start = 0;
    int sum = 0;
    for (int i = 0; i < n; i++) {
        sum += arr[i];
    }
    int end = sum;
    int mid = start + (end - start) / 2;
    int ans = -1;
    while (start <= end) {
        if (allocationIsPossible(arr, n, m, mid)) {
            ans = mid;
            end = mid - 1;
        } else {
            start = mid + 1;
        }
        mid = start + (end - start) / 2;
    }
    return ans;
}

int main() {
    int arr[4] = {10, 20, 30, 40};
    int ans = bookAllocate(arr, 4, 2);
    cout << "Minimum pages: " << ans << endl;
    return 0;
}
  

// output is 60