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04- April/27- Bulb Switcher/27- Bulb Switcher (Noura Algohary).cpp
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// Author: Noura Algohary | ||
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class Solution { | ||
public: | ||
int bulbSwitch(int n) { | ||
// bulbs are counted (turned on) when it have odd number of divisors | ||
// only numbers with perfect square roots have odd divisors | ||
// to count the number of perfect square roots in n, | ||
// it must be equal to sqrt(n) | ||
return sqrt(n); | ||
} | ||
}; |
11 changes: 11 additions & 0 deletions
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04- April/27- Bulb Switcher/27- Bulb Switcher (Noura Algohary).py
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# Author: Noura Algohary | ||
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class Solution: | ||
def bulbSwitch(self, n: int) -> int: | ||
# bulbs are counted (turned on) when it have odd number of divisors | ||
# only numbers with perfect square roots have odd divisors | ||
# to count the number of perfect square roots in n, | ||
# it must be equal to sqrt(n) | ||
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return int(n ** 0.5) | ||
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