Helpful_Maths.cpp

#include <iostream>
using namespace std;

int main() {
	int arr[1001];
	string s;
	cin>>s;
	int count=0;
	for(int i=0;i<s.size();i++){
	    if(s[i]=='+'){
	        continue;
	    }else{
	        arr[count++]=s[i]-'0';
	    }
	}
	sort(arr,arr+count);
	for(int i=0;i<count;i++){
	    cout<<arr[i];
	    if(i==count-1){
	        break;
	    }
	    cout<<"+";
	}
	return 0;
}