zoj 1205

感想：水题不解释

#include<iostream>#include<stdio.h>#include<algorithm>#include<string>#include<stack>#include<map>#include<vector>#include<deque>#include<cmath>using namespace std;int exc(char c){if(c>='0'&&c<='9')return c-'0';return c-'a'+10;}char exc(int i){if(i<10)return '0'+i;return 'a'+i-10;}string add(string a,string b){int temp=0,i,j;string s;char c;for(i=0;i<b.size();i++){j=exc(b[b.size()-1-i])+exc(a[a.size()-i-1])+temp;if(j>=20){j-=20;temp=1;} elsetemp=0;s=exc(j)+s;}//cout<<a<<" "<<i<<" "<<temp<<endl;while(1){if(a.size()-i-1==-1){if(temp)s='1'+s;return s;}else if(exc(a[a.size()-i-1])+temp==20){s='0'+s;}else{temp=0;s=a[a.size()-i-1]+s;}i++;}}int main(){string s1,s2;while(cin>>s1>>s2){if(s1.size()<s2.size())swap(s1,s2);cout<<add(s1,s2)<<endl;}}