2020-07-20 A+B Problem（高精）

题目：A+B Problem（高精）

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<cstring>
using namespace std;

int read(){
    int x = 0,f = 1;
    char c = getchar();
    while (c<'0'||c>'9') {
        if (c=='-') {
            f = -1;
        }
        c = getchar();
    }
    while (c>='0'&&c<='9') {
        x = x*10+c-'0';
        c = getchar();
    }
    return x*f;
}

int c[505];//一张地图，有雷为一，无雷为零
int main()
{
    string a,b;
    cin>>a;
    cin>>b;
    reverse(a.begin(),a.end());
    reverse(b.begin(),b.end());
    //cout<<a<<"/"<<b<<endl;
    long n = max(a.length(), b.length())-1;
    for (int i = 0; i<max(a.length(),b.length()); i++) {
        int ans = 0;
        if (i>=b.length()) {
            ans = (a[i]-'0');
        }else if(i>=a.length()){
            ans = (b[i]-'0');
        }else{
            ans = (a[i]-'0') + (b[i]-'0');
        }
        ans += c[i];
        if (ans>=10) {
            c[i] = ans-10;
            c[i+1] += 1;
            if(i==n){
                n++;
            }
        } else {
            c[i] = ans;
        }
    }
    for (long i = n; i>=0; i--) {
            cout<<c[i];
    }
    return 0;//愉快的结束了主程序
}
/*
1000000000000000000000
199
 
 46546876443156448001
 46453168410002134684
 93000044853158582685
*/