题解 | The Biggest Water Problem
The Biggest Water Problem
https://www.nowcoder.com/practice/435aa556e093463891f6da7d322140a4
#include <stdio.h>
int main() {
int a;
scanf("%d", &a);
int sum = 0;
int k = 0;
while (1) {
sum = 0;
while (a) {
k = a % 10;
sum += k;
a = a / 10;
}
if (sum < 10) {
printf("%d", sum);
break;
}
a = sum;
}
return 0;
}
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