#include <iostream>
#include <cstring>
#include <cstdio>
using namespace std;

char s[14451245];
int i,n;
int main()
{
    int c=0;
    gets(s);
    cin>>n;
    for(i=0;i<strlen(s);++i)
    {
        if(s[i]==‘.‘)
        {
            c=i;
            break;
        }
    }
    if(s[c+n+1]>=‘5‘&&s[c+n+1]<=‘9‘)
    s[c+n]++;
    int k=0;
    while(s[c+n-k]>‘9‘)
    {
        s[c+n]=‘0‘;
        s[c+n-1]++;
        k++;
    }
    for(i=0;i<c+n+1;++i)
    cout<<s[i];
}