/*#include<stdio.h>
int n;
int f(int n)
{
int i,dab=0;
for(i=1; i<=n; i++)
{
if(n%i==0)
{
dab++;
}
}
return dab;
}
int main()
{
scanf("%d", &n);
printf("%d\n", f(n));
}*/
/*#include<stdio.h>
long long int n,m;
long long int f()
{
if(n<m)
return m-n;
else if(m<n)
return n-m;
else
return n-m;
}
int main()
{
scanf("%lld %lld", &n, &m);
printf("%lld\n", f(n, m));
}*/
/*#include<stdio.h>
int n;
int f(int n)
{
long long int i, dovie=0;
for(i=1; i<=n; i++)
{
dovie=dovie+i;
}
return dovie;
}
int main()
{
scanf("%d", &n);
printf("%lld\n", f(n));
}*/