题解

#include<bits/stdc++.h>
using namespace std;
int a[105],b[105],c[105];
string s1,s2;
int main(){
	cin>>s1>>s2;
    for(int i=0;i<s1.size();i++){
        a[i]=s1[s1.size()-i-1]-'0';
    }
    for(int i=0;i<s2.size();i++){
        b[i]=s2[s2.size()-i-1]-'0';
    }
    for(int i=0;i<max(s1.size(),s2.size());i++){
        c[i]+=a[i]+b[i];
        c[i+1]+=c[i]/10;
        c[i]%=10;
    }
    int l=max(s1.size(),s2.size())-1;
    if(c[l+1])l++;
    for(int i=l;i>=0;i--)cout<<c[i];
	return 0;
}