#include <iostream>
#include<bits/stdc++.h>
 
#define fo(i,start,end) for(int i=start;i<end;i++)
using namespace std;
 
int FindDigitSum(int num){
	int sum = 0;
	while(num > 0){
		sum += (num%10);
		num /= 10;
	}
	return sum;
}
 
int main() {
	vector<int>arr = {51,71,17,42};
	int n = arr.size();
	vector<int>DigitSum;
	DigitSum.reserve(n);
	fo(i,0,n){
		DigitSum[i] = FindDigitSum(arr[i]);
	}
		fo(i,0,n){
		cout<<DigitSum[i]<<" ";
	}
 
	int MaxSumSeen = -1e9;
	for(int i=0;i<n;i++){
		for(int j=i+1;j<n;j++){
			if(DigitSum[i] == DigitSum[j]){
				int Sum = arr[i] + arr[j];
				MaxSumSeen = max(MaxSumSeen,Sum);
			}
		}
 
	}
	cout<<"Maximum Sum is :"<<MaxSumSeen<<endl;
	return 0;
}

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