1027 Colors in Mars (20分)

#include<iostream>
#include<algorithm>
#include<cstring>
#include<string>
#include<cstdio>
#include<cctype>
#include<cmath>
#include<vector>
#include<queue>
#include<set>
#include<map>
#include<stack>
#include<sstream>
#define mm(a,x) memset(a,x,sizeof(a))
#define maxn 100005
using namespace std;
typedef long long ll;
const int INF=0x3f3f3f3f;

int main()
{
   
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);
	string rgb={
   "0123456789ABC"};
	cout<<"#";
	for(int i=1;i<=3;i++)
	{
   
		int x;
		cin>>x;
		cout<<rgb[x/13]<<rgb[x%13];
	}
}