+#include <stdio.h>
+#include <stdbool.h>
+#include <ctype.h>
+
+bool read_int(int *r)
+{
+ char c;
+ *r = 0;
+ while (isdigit(c = getchar()))
+ *r = *r*10 + c-'0';
+ return c != EOF;
+}
+
+int one(int winsize)
+{
+ int win[winsize+1], wi = 0, increase = 0;
+ for (; wi<winsize; wi++)
+ read_int(&win[wi]);
+ while (read_int(&win[wi])) {
+ if (win[wi] - win[(wi+winsize+2) % (winsize+1)] > 0)
+ increase++;
+ wi = (wi+1) % (winsize+1);
+ }
+ return increase;
+}
+
+int main(void)
+{
+ printf("%d\n", one(1));
+ return 0;
+}