题解 | #包含数字9的数#
包含数字9的数
https://www.nowcoder.com/practice/0948f4f3344c452f843afd3585dd0f8d
#include<stdio.h> int main() { int a = 0, sum = 0; for(int i = 1; i <= 2019; i++) { a = i; while(a != 0) { if(a%10==9) { sum++; break; } else a/=10; } } printf("%d", sum); return 0; }