short_link/decode.py

32 lines
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Python
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def main():
field_map = {
'A': 0, 'a': 1, 'B': 2, 'b': 3,
'C': 4, 'c': 5, 'D': 6, 'd': 7,
'1': 8, 'E': 9, 'e': 10, 'F': 11,
'f': 12, 'G': 13, 'g': 14, 'H': 15,
'h': 16, '2': 17, 'I': 18, 'i': 19,
'J': 20, 'j': 21, 'K': 22, 'k': 23,
'L': 24, 'l': 25, '3': 26, 'M': 27,
'm': 28, 'N': 29, 'n': 30, 'O': 31,
'o': 32, 'P': 33, 'p': 34, '4': 35,
'Q': 36, 'q': 37, 'R': 38, 'r': 39,
'S': 40, 's': 41, 'T': 42, 't': 43,
'5': 44, 'U': 45, 'u': 46, 'V': 47,
'v': 48, 'W': 49, 'w': 50, 'X': 51,
'x': 52, '6': 53, 'Y': 54, 'y': 55,
'Z': 56, 'z': 57, '7': 58, '8': 59,
'9': 60, '0': 61}
link_id = input("Please input link ID: ")
for c in link_id:
if c not in field_map.keys():
raise ValueError("Invalid link ID")
link_id_converted = 0
for i in range(len(link_id)):
link_id_converted += field_map[link_id[::-1][i]] * 62 ** i
print("Converted result is: {}".format(link_id_converted))
if __name__ == "__main__":
main()