Все задачи на 5.10.17 13:00

uts/uts_2017_sum_py/5/D.py

@@ -0,0 +1,34 @@
+import sys
+
+sys.stdin = open('robot.in', 'r')
+s = input()
+
+d = 0
+a = []
+f = 0
+c = 0
+x = 0
+y = 0
+for i in s:
+    if i == 'S':
+        if (x, y) in a:
+            print(c)
+            exit()
+        a.append((x, y))
+        c += 1
+        if d == 0:
+            x += 1
+        if d == 1:
+            y += 1
+        if d == 2:
+            x -= 1
+        if d == 3:
+            y -= 1
+    if i == 'L':
+        d = (d + 1) % 4
+    if i == 'R':
+        d = (d - 1) % 4
+if (x, y) in a:
+    print(c)
+else:
+    print(-1)