PAT 甲级 1027 Colors in Mars
https://pintia.cn/problem-sets/994805342720868352/problems/994805470349344768
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
代码:
#include <bits/stdc++.h>
using namespace std; const int maxn = 1e5 + 10;
char s[maxn];
char a[15] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C'}; void num(int n) {
int cnt = 0;
if(n == 0) printf("00");
else {
while(n != 0) {
s[cnt ++] = a[n % 13];
n /= 13;
} if(cnt == 1)
printf("0%s", s);
else {
for(int i = cnt - 1; i >= 0; i --)
printf("%c", s[i]);
}
} } int main() {
int x, y, z;
scanf("%d%d%d", &x, &y, &z);
printf("#");
num(x);
num(y);
num(z);
printf("\n");
return 0;
}
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