题解 | #a+b# 板子题acwing

#include <iostream>
#include <vector>

using namespace std;

vector<int> add(vector<int> &A,vector<int> &B){
	vector<int> res;
	int t = 0;
	for(int i = 0;i < A.size() || i < B.size();i ++){
		if(i < A.size())t += A[i];
		if(i < B.size())t += B[i];
		res.push_back(t % 10);
		t = t / 10;
	}
	if(t) res.push_back(t);
	return res; 
}

int main(){
	string a,b;
	while(cin >> a >> b){
		vector<int> A,B,C;
		for(int i = a.size() - 1;i >= 0;i --)A.push_back(a[i] - '0');
		for(int i = b.size() - 1;i >= 0;i --)B.push_back(b[i] - '0');
		
		C = add(A,B);
		for(int i = C.size() - 1;i >= 0;i --)cout << C[i];
		cout << endl;
	}
	return 0;
}