题解 100% AC

#include<iostream>
#include<cstring>
using namespace std;
char a1[1001];
int a[1001];
char b1[1001];
int b[1001];
int c[1001];
int main(){
	cin>>a1;
	cin>>b1; 
	int len1=strlen(a1);
	int len2=strlen(b1);
	for(int i=0;i<len1;i++){
		a[len1-1-i]=a1[i]-'0';
	}
	for(int i=0;i<len2;i++){
		b[len2-1-i]=b1[i]-'0';
	}
	int len=0;
	int x=0;
	len=len1>len2?len1:len2;
	for(int i=0;i<len;i++){
		c[i]=a[i]+b[i]+x;
		x=c[i]/10;
		c[i]=c[i]%10;
	}
	if(x>0){
		len++;
		c[len-1]=x;
	}
	for(int i=len-1;i>=0;i--){
		cout<<c[i];
	}
    return 0;
}