80分求调,必关

#include<bits/stdc++.h>
using namespace std;
vector<int>a;
vector<int>b;
vector<int>c;
string sa,sb;
int main(){
	cin>>sa>>sb;
	reverse(sa.begin(),sa.end());
	reverse(sb.begin(),sb.end());
	if(sb.size()>sa.size()) swap(sa,sb);
	a.resize(sa.size());
	b.resize(sb.size());
	for(int i=0;i<sa.size();i++){
		a[i]=sa[i]-'0';
	}
	for(int i=0;i<sb.size();i++){
		b[i]=sb[i]-'0';
	}
	int la=sa.size(),lb=sb.size();
	c.resize(la+1);
	for(int i=0;i<la;i++){
		if(i<lb){
			c[i]+=a[i]+b[i];
		}
		else c[i]+=a[i];
		c[i+1]+=c[i]/10;
		c[i]%=10;
	}
	if(c[la]) la++;
	while(c[la]==0) la--;
	for(int i=la;i>=0;i--){
		cout<<c[i];
	}
    return 0;
}