package leetcode_study

import io.kotest.matchers.shouldBe

import org.junit.jupiter.api.Test

import java.util.Deque

import java.util.ArrayDeque

class `valid-parentheses` {

/**

fun isValid(s: String): Boolean {

if (s.length % 2 != 0) return false

val parentheses = mapOf(

'(' to ')',

'{' to '}',

'[' to ']'

)

val stack: Deque<Char> = ArrayDeque()

for (char in s) {

if (parentheses.containsKey(char)) {

stack.push(char)

} else if (stack.isEmpty() || parentheses[stack.pop()] != char){

return false

}

}

return stack.isEmpty()

}

@Test

fun `입력한 문자열의 괄호의 열림과 닫힘을 검증한다`() {

isValid("()") shouldBe true

isValid("{()}") shouldBe true

isValid("(){}[]") shouldBe true

isValid("{(}") shouldBe false

isValid("){") shouldBe false

}

}