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- #!/usr/bin/env python3
- import sys
- def to_decimal(snafu):
- return sum(5 ** i * ('=-012'.index(digit) - 2)
- for i, digit in enumerate(reversed(snafu)))
- def to_snafu(decimal):
- digits = []
- while decimal:
- decimal, rem = divmod(decimal, 5)
- decimal += rem > 2
- digits.append('012=-'[rem])
- return ''.join(reversed(digits))
- print(to_snafu(sum(to_decimal(line.rstrip()) for line in sys.stdin)))
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