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10-janghw0126 #158
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μ λ νμ λ νμ΄λ λΉμ·νκ² νμμ΅λλ€! μμμ λ ¬ λ§μ€ν°λ μ½μ§ μμ κ² κ°μμ π μ λ λ°λΌμ μ΄μ¬ν νκ² μ΅λλ€! μ΄λ² μ°¨μλ μκ³ νμ ¨μ΄μ import java.io.BufferedReader
import java.io.InputStreamReader
import java.util.StringTokenizer
import java.util.LinkedList
import java.util.Queue
fun main() {
val br = BufferedReader(InputStreamReader(System.`in`))
var st = StringTokenizer(br.readLine())
val N = st.nextToken().toInt()
val M = st.nextToken().toInt()
var graph = Array(N+1, {mutableListOf<Int>()})
var edgeCnt = Array(N+1, {0})
for(i: Int in 0..M-1) {
st = StringTokenizer(br.readLine())
val A = st.nextToken().toInt()
val B = st.nextToken().toInt()
graph[A].add(B)
edgeCnt[B]++ // μ§μ
μ°¨μ κΈ°λ‘
}
var queue = LinkedList<Int>() as Queue<Int>
var answer = StringBuilder()
// μ§μ
μ°¨μ 0μΈ κ°μ νμ = λ³ΈμΈλ³΄λ€ μμ μμΌνλ μ¬λμ΄ μλ€
for(i: Int in 1..N) {
if(edgeCnt[i] == 0)
queue.offer(i);
}
while(!queue.isEmpty()) {
var student = queue.poll()
// λ¨μ νμ μ€μ λ³ΈμΈλ³΄λ€ μμ μμΌνλ μ¬λμ΄ μμΌλ―λ‘ λ°λ‘ μ€ μΈμμ€
answer.append(student).append(" ")
for(i: Int in 0..graph[student].size - 1) {
// νμ¬ νμλ³΄λ€ λ€μ μμΌνλ νμ => μμ μΈμμΌ νλ μ¬λμ΄ ν λͺ
μ€μ΄λ¦
var back = graph[student][i]
edgeCnt[back]--
// ν λͺ
μ€μ΄λ€λ©΄μ λμ΄μ μμ μμΌνλ μ¬λμ΄ μμΌλ©΄ νμ μΆκ°
if(edgeCnt[back] == 0) {
queue.offer(back)
}
}
}
print(answer)
} |
jung0115
approved these changes
Sep 18, 2024
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π λ¬Έμ λ§ν¬
λ°±μ€ | μ€ μΈμ°κΈ°
βοΈ μμλ μκ°
1μκ°
β¨ μλ μ½λ
μ΄ λ¬Έμ λ λ νμμ ν€λ₯Ό λΉκ΅νλ©΄μ νμλ€μ μμ μ λ ¬μ μ΄μ©νμ¬ μ€ μΈμ°λ λ¬Έμ μμ΅λλ€. λ¬Έμ μ μ§λ¬Έμ λ°λΌ, μ΄λ€ νμμ΄ λ€λ₯Έ νμλ³΄λ€ μμ μμΌ νλ€λ 쑰건μ λ§μ‘±μν€λ©΄μ λͺ¨λ νμμ λμ΄ν΄μΌ νλ―λ‘ μμκ° μ ν΄μ Έ μλ μμ μ μ°¨λ‘λλ‘ μνν΄μΌ λλ μμμ λ ¬μ μ¬μ©ν΄μΌκ² λ€λ μκ°μ νμμ΅λλ€.
π λ¬Έμ ν΄κ²° κ³Όμ
π¨ ν΅μ¬ λ‘μ§
μ΄ λ¬Έμ λ μΈμ΄ν΄μ΄ μκΈ° λλ¬Έμ μμμ λ§νλ―μ΄ μμ μ λ ¬μ ν΅ν΄ νμλ€μ μ λ ¬ν μ μμ΅λλ€. νκ° λΉμ΄κ° λκΉμ§, μ§μ μ°¨μκ° 0μΈ νμλ€μ μ°¨λ‘λ‘ μ²λ¦¬ν΄μ£Όλ©΄ μμλλ‘ μ€μ μΈμΈ μ μμΌλ―λ‘ μ΄λ¬ν λ‘μ§μ λ°νμΌλ‘ λ¬Έμ λ₯Ό νμμ΅λλ€.
π©βπ» μ΅μ’ μ½λ
π μλ‘κ² μκ²λ λ΄μ©
μμμ λ ¬μ λ§μ€ν°ν΄λ³΄κ³ μ μμ¦ μ΄ μ ν λ¬Έμ λ§ μ£½λλ‘ νκ³ μλλ° μμ μ½μ§ μμ μ νμ΄κ΅°μ¬,,,,
μ΄μ¬ν μμμ£ ν΄λ³΄κ² μ΅λλ·π ππ