recursion3

#include <stdio.h>

//int c = 0;

void function(int n)
{
    static int b = 1, sum = 0;
    if(b > n){
        printf("%d\n", sum);
        return;
    }
    sum+=b;
    b++;
    function(n);
}

int main()
{
    int n;
    scanf("%d", &n);
    function(n);
    return 0;
    //main();
}