C :

#include <stdio.h>
#include <stdlib.h>
int main()
{
	int n;
	scanf("%d",&n);
	int i;
	int sum1=0,sum2=0;
	for(i=1;i<=n;i++)
	{
		if(i%2!=0)
			sum1+=i;
		else
			sum2+=i;
	}
	printf("%d %d",sum1,sum2);
	return 0;
}
//Author: ITProgrammer

C++ :

#include <iostream>
using namespace std;

int main(){ 
    int i,n,s=0,c=0;
    cin>>n;
    for(i=1;i<=n;i=i+2){
    	s=s+i;
	}for(i=2;i<=n;i=i+2){
		c=c+i;
	}cout<<s<<"\\"<<c<<endl;
}

Pascal :

program ex_1091;
var
  n,i,s,r:integer;
begin
  readln(n);
  for i:=1 to n do 
    if i mod 2=0 then r:=r+i else s:=s+i;
  writeln(s,' ',r);
end.

Java :

import java.util.Scanner;
public class Main{
	public static void main(String[] args) {
		int n=new Scanner(System.in).nextInt();
		int sum_j=0;
		int sum_o=0;
		for(int i=1;i<=n;i++){
			if(i%2==0){
				sum_o=sum_o+i;
			}else{
				sum_j=sum_j+i;
			}
		}
		System.out.println(sum_j+"\\"+sum_o);
	}
}

Python :

n = int(input())
s = 0
t = 0
for i in range(1, n + 1):
    if i % 2 == 0:
        s += i
    if i % 2 == 1:
        t += i
print(str(t)+' '+str(s))