稻花香里说丰年，听取WA声一片

#include<bits/stdc++.h>
using namespace std;
string abb(string x, string y) {
	string c = "";
	int f = 0;
	if (x.size() < y.size()) {
		swap(x, y);
	}
	reverse(x.begin(), x.end());
	reverse(y.begin(), y.end());
	for (int i = 0;i < y.size();i++) {
		if (x[i] + y[i] - '0' - '0' + f < 10) {
			
			c += char(x[i] + y[i] - '0' + f);f = 0;
		}
		else {
			
			c += char(x[i] + y[i] - '0' + f - 10);f = 1;
		}
	}
	for (int i = y.size();i < x.size();i++) {
		if (x[i] - '0' - '0' + f < 10) {
			
			c += char(x[i] + f);f = 1;
		}
		else{
			
			c += char(x[i] + f - 10);f = 0;
		}
	}
	if (f) {
		c += char('1');
	}
	return c;
}
int main() {
	string a, b;
	cin >> a >> b;
	cout << abb(a, b);

	return 0;



}