# 题目

People in Mars represent the colors in their computers in a similar way as the Earth people. That is, a color is represented by a 6-digit number, where the first 2 digits are for Red, the middle 2 digits for Green, and the last 2 digits for Blue. The only difference is that they use radix 13 (0-9 and A-C) instead of 16. Now given a color in three decimal numbers (each between 0 and 168), you are supposed to output their Mars RGB values.
Input
Each input file contains one test case which occupies a line containing the three decimal color values.
Output
For each test case you should output the Mars RGB value in the following format: first output “#”, then followed by a 6-digit number where all the English characters must be upper-cased. If a single color is only 1-digit long, you must print a “0” to the left.
Sample Input
15 43 71
Sample Output
#123456

# 源代码

#include <iostream>

using namespace std;

string s = "";
int count = 0; //记录循环次数，与输出的位数相同
while(tmp){
int rest = tmp % 13;
++count;
if(rest >= 0 && rest <= 9){
s = (char)(rest + '0') + s;
}
else if(rest == 10){
s = 'A' + s;
}
else if(rest == 11){
s = 'B' + s;
}
else if(rest == 12){
s = 'C' + s;
}
tmp /= 13;
}
if(count == 0){ //若没循环，则用00补位
s = "00" + s;
}
else if(count == 1){ //若只循环一次，则用0补位
s = '0' + s;
}
return s;
}

int main(){
int a, b, c;
scanf("%d %d %d", &a, &b, &c);