tijie

#include<bits/stdc++.h>
using namespace std;
int a[1005],b[1005],c[1005];
string s1,s2;
int l1,l2;
int main(){
cin >> s1 >> s2;
l1 = s1.size();
l2 = s2.size();
for(int i = 0;i < l1;i++) a[i] = s1[l1 - i - 1] - '0';
for(int i = 0;i < l2;i++) b[i] = s2[l2 - i - 1] - '0';
int l = max(l1,l2);
for(int i = 0;i < l;i++){
c[i] += a[i] + b[i];
c[i + 1] += c[i] / 10;
c[i] %= 10;
}
if(c[l] > 0) l++;
for(int i = l - 1;i >= 0;i--){
cout << c[i];
}
return 0;
}