Divide Number into Equal Size Groups and Sum Them

The program must accept an integer N and divide it into groups of equal size (of 2 or 3 or 4 etc). Then, the program should sum up these groups and print the result. If the number cannot be divided into groups of equal size, consider the largest group size possible.

Boundary Condition(s):
10 <= N <= 10^9

Input Format:
The first line contains the integer N.

Output Format:
A single line contains the result after summing the groups.

Example Input/Output 1:
Input:
5423

Output:
107

Explanation:
The number is divided into groups of two: 54 and 23. Their sum is 77.

N = input().strip()
group_size = 2 if len(N) % 2 == 0 else 3
groups = [int(N[i:i+group_size]) for i in range(0, len(N), group_size)]
print(sum(groups))

#include<stdio.h>
#include<string.h>

int main() {
    char N[11];
    scanf("%s", N);
    int len = strlen(N);
    int group_size = (len % 2 == 0) ? 2 : 3;
    int sum = 0;

    for(int i = 0; i < len; i += group_size) {
        int group = 0;
        for(int j = 0; j < group_size && i+j < len; j++) {
            group = group * 10 + (N[i+j] - '0');
        }
        sum += group;
    }

    printf("%d", sum);
    return 0;
}

#include <iostream>
#include <cstring>
using namespace std;

int main() {
    char N[11];
    cin >> N;
    int len = strlen(N);
    int group_size = (len % 2 == 0) ? 2 : 3;
    int sum = 0;

    for(int i = 0; i < len; i += group_size) {
        int group = 0;
        for(int j = 0; j < group_size && i+j < len; j++) {
            group = group * 10 + (N[i+j] - '0');
        }
        sum += group;
    }

    cout << sum;
    return 0;
}

import java.util.Scanner;

public class GroupAndSum {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String N = sc.next();
        int len = N.length();
        int group_size = (len % 2 == 0) ? 2 : 3;
        int sum = 0;

        for(int i = 0; i < len; i += group_size) {
            String group = N.substring(i, Math.min(i+group_size, len));
            sum += Integer.parseInt(group);
        }

        System.out.println(sum);
    }
}