#include<iostream>
using namespace std;
int main(){
    int n,V=1,day=0;
    cin>>n;
    while(!(V>n)){
        V*=2;
        ++day;
    }cout<<day;
}
```cpp
#include<iostream>
using namespace std;
int main(){
    int n,V=1,day=0;
    cin>>n;
    while(!(V>n)){
        V*=2;
        ++day;
    }cout<<day;
}
```


细菌繁殖

#include<iostream> u

#include<iostream>
using namespace std;
int main(){
int n,V=1,day=0;
cin>>n;
while(!(V>n)){
V*=2;
++day;
}cout<<day;
}