#include <stdio.h>
void SortedPrint(const int n)
{
int count1 = 0;
int count2 = 0;
int count3 = 0;
int arr[100] = { 0 };
for (int i = 0; i < n; i++)
{
scanf("%d", &arr[i]);
}
for (int i = 0; i < n; i++)
{
for (int j = i + 1; j < n; j++)
{
if (arr[i] <= arr[j])
{
count1++;
}else if (arr[i] > arr[j])
{
count2++;
}
else
{
count3++;
}
}
}
//("%d %d %d", count1, count2, count3);
if (count3 == 0 && count2 == 0 || count3 == 0 && count1 == 0)
{
printf("sorted\n");
}
else
{
printf("unsorted\n");
}
}
int main()
{
int n = 0;
scanf("%d", &n);
SortedPrint(n);
return 0;
}