Merge in practice data (use git subtree merge to update)

practice/A.py

@@ -0,0 +1,3 @@
+import sys
+N = int(sys.stdin.readline())
+print(N**0.5*4)

practice/A_.py

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+import sys
+N = int(sys.stdin.readline())
+if "PyPy" in sys.version:
+  print(N**0.5*4)
+else:
+  raise RuntimeError("WTF")

practice/B.py

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+from __future__ import print_function
+import sys
+
+s, e      = map(int, sys.stdin.readline().split())
+es        = map(int, sys.stdin)
+
+OK        = [ [0]*(s+1) for i in xrange(e+1) ]
+OK[0][0]  = 1
+
+for i in xrange(e):
+  for j in xrange(s+1):
+    if OK[i][j]: OK[i+1][j] = 1
+    if es[i] > j: continue
+    if OK[i][j-es[i]]: OK[i+1][j] = 2
+
+ns = []; i, j = e, s
+while i > 0 and j >= 0:
+  x = OK[i][j]
+  if x == 2:
+    ns.append(i-1)
+    i -= 1
+    j -= es[i]
+  else:
+    i -= 1
+
+# print(ns)
+# import pprint; pprint.pprint(OK)
+
+print(e+1)
+k, l = 1, 3
+for n in ns[:-1]:
+  print(k, l, es[n])
+  k = l; l += 1
+print(k, 2, es[ns[-1]])
+ns = set(ns); k = 2
+for i,j in enumerate(es):
+  if i not in ns:
+    print(k, l, j)
+    k = l; l += 1

practice/C.py

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+from __future__ import print_function
+import sys
+P = sys.stdin.readline().rstrip()
+N = 26-len(set(P))
+print(N if N != 0 else "impossible")