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131D. Subway
Gold V
๊นŠ์ด ์šฐ์„  ํƒ์ƒ‰๊ทธ๋ž˜ํ”„ ์ด๋ก ๊ตฌํ˜„๋Ÿฐํƒ€์ž„ ์ „์˜ ์ „์ฒ˜๋ฆฌ์Šค์œ„ํ•‘์ด๋ถ„ ํƒ์ƒ‰์ž๋ฃŒ ๊ตฌ์กฐ์ •๋ ฌ
Codeforces

์ด ๋ฌธ์ œ์— ๋Œ€ํ•œ ๊ฐ€์ด๋“œ

์•„์ง ์ž‘์„ฑ๋œ ๊ฐ€์ด๋“œ๊ฐ€ ์—†์Šต๋‹ˆ๋‹ค.

์ด ๋ฌธ์ œ๋ฅผ ํฌํ•จํ•˜๋Š” ๋ฌธ์ œ์ง‘