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π λ¬Έμ λ§ν¬
https://www.acmicpc.net/problem/1874
βοΈ μμλ μκ°
μ½ 1μκ°
β¨ μλ μ½λ
π1. λ¬Έμ μ€λͺ
μ£Όμ΄μ§ μμ΄μ μ€νμ μ¬μ©ν΄ λ§λ€μ΄λΌ μ μλμ§ νμΈνκ³ , κ°λ₯νλ€λ©΄ μ΄λ€ push (+)μ pop(-) μ°μ°μ μνν΄μΌ νλμ§λ₯Ό μΆλ ₯νλ λ¬Έμ μ λλ€.
π§ν΅μ¬ : μ€νμ νμ μ μΆ νΉμ±κ³Ό, μλ₯Ό λ£λ μμκ° λ°λμ μ€λ¦μ°¨μμ΄μ΄μΌ νλ€λ 쑰건
π2. λ¬Έμ νμ΄ λ Όλ¦¬
π1) μ λ ₯ λ°κΈ°π
π2) μ€νμ μλ₯Ό pushνλ κ³Όμ π
π3) pop μ°μ° μ²λ¦¬π
π4) λΆκ°λ₯ν κ²½μ° μ²λ¦¬π
π5) κ²°κ³Ό μΆλ ₯π
π μλ‘κ² μκ²λ λ΄μ©
μ€νμ μ¬μ©νλ©΄μ νμ μ μΆ νΉμ±μ νμ©ν΄λ³Ό μ μμ΄μ μ’μμ΅λλ€. μ€ν λ¬Έμ λ₯Ό μ€λλ§μ νμ΄λ΄€λλ°,
ν΄λ³΄λ μκ°λ λκ³ κ³΅λΆν μ μμ΄μ μ’μλ κ² κ°μ΅λλ€.