#include <stdio.h>

int main ()
{
    int somma,np,n;
    printf("Inserisci n");
    scanf("%d",&n);
    np=1;
    for (np =1;np <= n;np++)
    {
    somma=somma + np;
    printf("%d",somma);
}
    getchar();getchar();
    return 0;
}