【HDU】6033 - Add More Zero（数学推导）

#include<cmath>
#include<cstdio>
#include<algorithm>
using namespace std;
typedef long long LL;
int main()
{
int m;
int Case = 1;
while (~scanf ("%d",&m))
{
int ans = m * (log(2.0) / log(10.0));
printf ("Case #%d: %d\n",Case++,ans);
}
return 0;
}