Все задачи на 5.10.17 13:00

uts/session_py/dist_march_2k17/Business.py

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+import sys
+
+sys.stdin = open("input.txt", "r")
+sys.stdout = open("output.txt", "w")
+
+n = int(input())
+c = [None for i in range(n+1)]
+for i in range(1, n, 2):
+    c[i] = 0
+c[2] = 1
+c[0] = 1
+def recursion(n, c):
+    if c[n] != None:
+        return c[n]
+    kkk = 0
+    for i in range(1, n):
+        kkk += recursion(i-1, c) * recursion(n-i-1, c)
+    c[n] = kkk
+    return kkk
+print(recursion(n, c))

uts/session_py/dist_march_2k17/Peter.py

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+import sys
+
+sys.stdin = open("input.txt", "r")
+sys.stdout = open("output.txt", "w")
+s = int(input())
+l = 1
+h = int(10e18)
+while l <= h:
+    mid = (l+h)//2
+    x = mid
+    now = mid
+    while x != 0:
+        st = str(x)
+        st = st[:-1]
+        if len(st) == 0:
+            break
+        x = int(st)
+        now += x
+    if now == s :
+        print(mid)
+        quit()
+    elif now < s :
+        l = mid + 1
+    else :
+        h = mid - 1
+print(-1)

uts/session_py/dist_march_2k17/Sherlock.py

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+import sys
+
+sys.stdin = open("input.txt", "r")
+sys.stdout = open("output.txt", "w")
+
+test_num = int(input())
+for test in range(test_num):
+    b = 'NO'
+    n = int(input())
+    a = list(map(int, input().split()))
+    if n == 1:
+        b = 'YES'
+    elif n == 2:
+        b = 'NO'
+    else:
+        left = 0
+        right = sum(a[1:])
+        for i in range(1, n-1):
+            left += a[i - 1]
+            right -= a[i]
+            if left == right:
+                b = 'YES'
+                break
+    print(b)

uts/session_py/dist_march_2k17/String.py

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+import sys
+
+sys.stdin = open("input.txt", "r")
+sys.stdout = open("output.txt", "w")
+orig, end = input(), input()
+
+while len(end) > len(orig):
+    if end[-1] == 'A':
+        end = end[:-1]
+    else:
+        end = end[:-1][::-1]
+
+if orig == end:
+    print('POSSIBLE')
+else:
+    print('IMPOSSIBLE')

uts/session_py/dist_march_2k17/input.txt

@@ -0,0 +1 @@
+50