YY
(某些同学不要想太多)
给出
,求出
输入
样例输入
387420489
样例输出
9
思路
有关换底公式
#include<iostream>
#include<cstring>
#include<cstdio>
#include<cmath>
using namespace std;
int main()
{
freopen("yy.in","r",stdin);
freopen("yy.out","w",stdout);
string s;
cin>>s;
for(int i=1;i<=s.length();++i)
if(floor(i*log10(i)+1)==s.length())
{
printf("%d",i);
break;
}
fclose(stdin);
fclose(stdout);
return 0;
}