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26 lines
489 B
Python
26 lines
489 B
Python
"""Modular Exponential."""
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def modular_exponential(base, power, mod):
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"""Calculate Modular Exponential."""
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if power < 0:
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return -1
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base %= mod
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result = 1
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while power > 0:
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if power & 1:
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result = (result * base) % mod
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power = power >> 1
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base = (base * base) % mod
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return result
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def main():
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"""Call Modular Exponential Function."""
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print(modular_exponential(3, 200, 13))
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if __name__ == "__main__":
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main()
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