Problem:
Score : 100 points

Problem Statement

Takahashi wants to print a document with N pages double-sided, where two pages of data can be printed on one sheet of paper.

At least how many sheets of paper does he need?

Constraints

N is an integer.

1 \leq N \leq 100

Input

Input is given from Standard Input in the following format:

N

Output

Print the answer.

Sample Input 1

5

Sample Output 1

3

By printing the 1-st, 2-nd pages on the 1-st sheet, 3-rd and 4-th pages on the 2-nd sheet, and 5-th page on the 3-rd sheet, we can print all the data on 3 sheets of paper.

Sample Input 2

2

Sample Output 2

1

Sample Input 3

100

Sample Output 3

50

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>

//#include <iostream>
//#include <vector>
//#include <string.h>

#pragma warning (push)
#pragma warning (disable : 4996)
#define mod 1000000007;

//using namespace std;

int main()
{
    int N;
    
    scanf("%d", &N);

    char ret[3];
    if (N % 2 == 1) {
        sprintf(ret, "%d", (int)(N / 2 + 1));
    }
    else {
        sprintf(ret, "%d", (int)(N / 2));
    }

    printf(ret);
}

#pragma warning (pop)