题解

#include<iostream>
#include<cmath>
using namespace std;
int main(){
    string s;
    double n;
    cin>>s>>n;
    if(s=="ceil"){
        cout<<ceil(n);
    }else if(s=="floor"){
        cout<<floor(n);
    }else if(s=="round"){
        cout<<round(n);
    }
    return 0;
}