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22 changes: 22 additions & 0 deletions boj/Random Defense/1475_sungwoo.kt
Original file line number Diff line number Diff line change
@@ -0,0 +1,22 @@
fun main() {
val roomNumber = readln()
val count = IntArray(10)

// 각 숫자 카운트
for (ch in roomNumber) {
val digit = ch - '0'
count[digit]++
}

// 6과 9 합쳐서 세트 계산
val sixNineSet = (count[6] + count[9] + 1) / 2

// 6과 9는 제외하고 나머지 숫자 중 최대값 찾기
var maxCount = sixNineSet
for (i in 0..9) {
if (i == 6 || i == 9) continue
maxCount = maxOf(maxCount, count[i])
}

println(maxCount)
}