[Jeehay Park(박지혜)] Week 2 #724
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TonyKim9401
reviewed
Dec 21, 2024
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+16
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+37
| var climbStairs = function (n) { | ||
| let ways = 0; | ||
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| let maxStepTwo = Math.floor(n / 2); | ||
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| const factorial = (num) => { | ||
| if (num === 0 || num === 1) { | ||
| return 1; | ||
| } | ||
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| for (let i = 2; i <= num; i++) { | ||
| return num * factorial(num - 1); | ||
| } | ||
| }; | ||
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| for (let i = 0; i <= maxStepTwo; i++) { | ||
| const stepTwo = i; | ||
| const stepOne = n - 2 * i; | ||
| const steps = stepTwo + stepOne; | ||
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| ways += factorial(steps) / (factorial(stepTwo) * factorial(stepOne)); | ||
| } |
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DP를 사용하시면 시간 복잡도를 O(n) 으로 줄일 수 있을것 같아요 :)
TonyKim9401
approved these changes
Dec 21, 2024
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