PAT 甲级1027. Colors in Mars (20)

有一个点没过去

#include "bits/stdc++.h"
using namespace std;

string work="0123456789ABC";
string toString13(int num)
{
string s;
while(num)
{
s=work[num%13]+s;
num/=13;
}
return s;
}
int main() {
int n=3;
while(n--)
{
int num;
cin>>num;
if(n==2) cout<<"#";
string s=toString13(num);
if(s.size()==1)
cout<<0;
cout<<s;
}
return 0;
}