HDU 5832 A water problem

8.14日网络赛第1题

题目：点击打开链接

Description

Two planets named Haha and Xixi in the universe and they were created with the universe beginning.  There is   days in Xixi a year and   days in Haha a year.  Now you know the days   after Big Bang, you need to answer whether it is the first day in a year about the two planets.

Input

There are several test cases(about   huge test cases).  For each test, we have a line with an only integer  , the length of   is up to  .

Output

For the i-th test case, output Case #i: , then output "YES" or "NO" for the answer.

Sample Input

10001 0 333

Sample Output

Case #1: YES Case #2: YES Case #3: NO

直接一位一位地算

我们队伍的代码：

#include<cstdio> #include<cstdlib> #include<cstring> #define N 10000001 char str[N]; int len; int i; int mod; long long ans; int ca; int main() { mod = 10001; while(scanf("%s", str) != EOF) { ca++; ans = 0; len = strlen(str); for(i = 0; i < len; i++)ans = (ans * 10 + str[i]-'0') % mod; if(ans == 0) printf("Case #%d: YES\n", ca); else printf("Case #%d: NO\n", ca); } return 0; }

虽然很慢，但是AC了