tijie

#include <bits/stdc++.h>
using namespace std;

int a[10010],b[10010],c[10010];

int main(){
	string s1,s2;
	cin >> s1 >> s2;
	int l1 = s1.size();
	int l2 = s2.size();
	int len = max(l1,l2)-1;
	for(int i=0;i<l1;i++){
		a[i] = s1[l1-1-i] - '0';
	}
	for(int i=0;i<l2;i++){
		b[i] = s2[l2-1-i] - '0';
	}
	for(int i=0;i<=len;i++){
		c[i] += a[i] + b[i];
		c[i+1] += c[i]/10;
		c[i] %= 10;	
	} 
	if(c[len+1]) len++;
	for(int i=len;i>=0;i--){
		cout << c[i] ; 
	} 
	return 0;
}