高精度可解

#include <bits/stdc++.h>
using namespace std;
int a[10010],b[10010],c[10010];
string s1,s2;
int main(){
    cin >> s1;//输入数据
    s2 = s1;
    s1 += "0000";
    int l1 = s1.size(),l2 = s2.size();
    for(int i = 0;i < l1;i++)a[i] = s1[l1 - i - 1] - '0';
    for(int i = 0;i < l2;i++)b[i] = s2[l2 - i - 1] - '0';
    int mxl = max(l1,l2);
    for(int i = 0;i < mxl;i++){
        c[i] += a[i] + b[i];
        c[i + 1] = c[i] / 2;
        c[i] %= 2;
    }
    if(c[mxl] > 0)mxl++;
    for(int i = mxl - 1;i >= 0;i--){
        cout << c[i];
    }
}