题解 | #Digital Roots# #C
Digital Roots
https://www.nowcoder.com/practice/cef727d0af33479c9fb4a9c120702414?tpId=40&rp=1&ru=%2Fta%2Fkaoyan&qru=%2Fta%2Fkaoyan&difficulty=&judgeStatus=&tags=&title=72&sourceUrl=&gioEnter=menu
#include <stdio.h>
int main() {
int a;
while (scanf("%d", &a) != EOF) {
int sum=0;
while (1) {
sum=0;
while (a) {
sum+=a%10;
a/=10;
}
if (sum<10){
break;
}else {
a=sum;
}
}
printf("%d\n", sum);
}
return 0;
}
#c#
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