Data commit

Task/Find-the-missing-permutation/11l/find-the-missing-permutation.11l

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+V perms = [‘ABCD’, ‘CABD’, ‘ACDB’, ‘DACB’, ‘BCDA’, ‘ACBD’, ‘ADCB’, ‘CDAB’,
+           ‘DABC’, ‘BCAD’, ‘CADB’, ‘CDBA’, ‘CBAD’, ‘ABDC’, ‘ADBC’, ‘BDCA’,
+           ‘DCBA’, ‘BACD’, ‘BADC’, ‘BDAC’, ‘CBDA’, ‘DBCA’, ‘DCAB’]
+
+V missing = ‘’
+L(i) 4
+   V cnt = [0] * 4
+   L(j) 0 .< perms.len
+      cnt[perms[j][i].code - ‘A’.code]++
+   L(j) 4
+      I cnt[j] != factorial(4-1)
+         missing ‘’= Char(code' ‘A’.code + j)
+         L.break
+
+print(missing)