题解 | #提取不重复的整数#
https://www.nowcoder.com/practice/253986e66d114d378ae8de2e6c4577c1
#include <stdio.h>
int main(void) {
int num = 0;
int n = 0;
char flags[10] = { 0 };
scanf("%d", &num);
while(num % 10) {
n = num % 10;
if(!flags[n])
printf("%d", n);
flags[n] = 1;
num /= 10;
}
}
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