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Ugly Numbers


About UglyNumbers

μ‹¬μˆ μŸμ΄ μˆ˜λŠ” 2,3,5의 곱으둜 λ§Œλ“€ 수 μžˆλŠ” μˆ˜μ΄λ‹€. λ‹€μŒκ³Ό 같은 μˆœμ„œμ˜ μˆ˜κ°€ 11개의 μ‹¬μˆ μŸμ΄ μˆ˜μ΄λ‹€.
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1,2,3,4,5,6,8,9,10,12,15,....
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처음 μˆ˜λŠ” 1둜 μ‹œμž‘ν•˜λ„λ‘ ν•œλ‹€. μž…λ ₯은 받지 μ•Šκ³ , <number> 에 1500번째 μ‹¬μˆ μŸμ΄ μˆ˜κ°€ 좜λ ₯되게 ν•œλ‹€.

Sample Output

The 1500'th ugly number is <number>.

λ‹΅

859963392

(ν˜Ήμ‹œλ‚˜ 더 λ§Žμ€ μˆ«μžλΌ μ‹€ν—˜ν•΄ 보고 싢은 μ‚¬λžŒμ„ μœ„ν•΄: 1550λ²ˆμ§ΈλŠ” ~cpp 1093500000, μ‹­λ§Œλ²ˆμ§ΈλŠ” ~cpp 290142196707511001929482240000000000000.)

풀이

μž‘μ„±μž μ‚¬μš©μ–Έμ–΄ κ°œλ°œμ‹œκ°„ μ½”λ“œ μ‹€ν–‰μ‹œκ°„(4초 톡과여뢀)
μ†‘μ§€ν›ˆ C++ 20λΆ„ UglyNumbers/μ†‘μ§€ν›ˆ .
κΉ€νšŒμ˜ c++ ? UglyNumbers/κΉ€νšŒμ˜ .
κ³½μ„Έν™˜ c++ ? UglyNumbers/κ³½μ„Έν™˜ O
문보창 c++ ? UglyNumbers/문보창 O
ꡬ자겸 c++ ? UglyNumbers/ꡬ자겸 .
ν™©μž¬μ„  Python 20λΆ„ UglyNumbers/ν™©μž¬μ„  O
1002 Python 2μ‹œκ°„ UglyNumbers/1002 O
JuNe Python 10λΆ„ UglyNumbers/JuNe O
Seminar:지원 Python 30λΆ„ Seminar:UglyNumbers/지원 O
μ΄λ™ν˜„ java 6μ‹œκ°„ UglyNumbers/μ΄λ™ν˜„ O
λ‚¨ν›ˆ Python 50λΆ„ UglyNumbers/λ‚¨ν›ˆ .
μ΄μŠΉν•œ Python 40λΆ„ UglyNumbers/μŠΉν•œ .
DamienRice Python 2μ‹œκ°„ UglyNumbers/DamienRice O

μ“°λ ˆλ“œ

문제의 μ˜λΈ μ „λ‹¬μ΄ 잘 μ•ˆλœλ‹€. μ‹¬μˆ μŸμ΄ μˆ˜κ°€ 뭔지 잘 λͺ¨λ₯΄κ² μ–΄ --강희경

음 λΆ€μ—°μ„λͺ…을 ν•˜μžλ©΄ μ–‘μ˜ μ •μˆ˜λ“€μ„ λŒ€μƒμœΌλ‘œ 일정 λΆ€λΆ„μ˜ μ •μˆ˜λ“€μ€ κ·Έ μˆ˜κ°€ 단지 2와 3κ³Ό 5의 곱으둜만 ν‘œν˜„λ μˆ˜ μžˆμž–μ•„. κ°€λ Ή 6=2*3 ν˜Ήμ€ 15=3*5 ν˜Ήμ€ 45 = 3*5*3 μ΄λŸ°μ‹μœΌλ‘œ μƒκ°ν• μˆ˜ μžˆμž–μ•„.κ·ΈλŸ°μ‹μœΌ λ”°μ‘Œμ„λ•Œ 숫자의 ν¬κΈ°μˆœμ„œλ‘œ λ³Όλ•Œ λ‚΄κ°€ λ§ν•œ 쑰건을 만μ±ν•˜λŠ” 1500번째 μ–‘μ˜ μ •μˆ˜λŠ” ?? 무슨 μˆ«μžμΈμ§€λΌ μΆœλ ₯해야돼 λ¬Όλ‘  좜λ ₯된 μ–‘μ˜ μ •μˆ˜λŠ” 2와 3κ³Ό 5만으둜 ν‘œν˜„λ˜κ² μ§€ κΉ€νšŒμ˜

λ§μ…ˆμ€ μ•ˆλ˜κ³  κ³±μ…ˆλ§Œ λ˜λŠ” λ“. --μ†‘μ§€ν›ˆ

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