#include <stdio.h>

int main(void)
{
int range = 1200;
int p = 13;
int x0 = 20;
int i = 0, j = 0;
int Xn = x0;
int ar;
int count;
for (; i < range; ++i)
{
/*printf("%d ", Xn);*/
ar = Xn;
Xn = (Xn + p) % range;
}

for (i = 0; i < range; ++i)
{
count = 0;
for (j = 0; j < range; ++j)
{
if (ar == i)
count++;
}
if (count != 1)
printf("%d", i);
}
return 0;
}