题解 | #数位之和#
数位之和
https://www.nowcoder.com/practice/5e85cc26475449648e668aa98e92d05b
#include <stdio.h> int main() { long long num = 0; scanf("%lld",&num); long long i = 10; long long result = 0; while (num % (i/10) != num) { result += (num % i - result) / (i/10) ; i *= 10; } printf("%lld\n",result); return 0; }