C++ :

#include <bits/stdc++.h>
using namespace std;
const int INF = 100000000;
char s[110];
int x,y;
int p = -1;
int main() {
cin.getline(s,105);
int len = strlen(s);
for(int i = 0; i < len; i++) {
if(s[i] == '+') {
p = i;
continue;
}
if(isdigit(s[i])) {
//判断是+之前还是之后
if(p == -1) x = x * 10 + (s[i] - '0');
else y = y * 10 + (s[i] - '0');
if(x > INF || y > INF || x + y > INF) {
cout<<"Large";
return 0;
} } }
cout<<x + y;
return 0;
}