Gym - 101243A Fried Fish【数学】

#include <iostream>
#include <cstring>
#include <string>
#include <cstdio>
#include <algorithm>
#include <cmath>
#include <vector>
#include <map>
using namespace std;
int main()
{
freopen("input.txt","r",stdin);
freopen("output.txt","w",stdout);
int n,k;
scanf("%d %d",&n,&k);
if(n<=k)
puts("2");
else if((2*n)%k)
printf("%d\n",2*n/k+1);
else
printf("%d\n",2*n/k);
return 0;
}