#include <iostream>
#include <sched.h>
using namespace std;

int main() {
    float x;
    cin>>x;
    float xiao;
    xiao=x-int(x);
    if(xiao<0.5){
        x=int(x);
    }else{
        x=int(x)+1;
    }
    cout<<x;
}
// 64 位输出请用 printf("%lld")