solve: 🐜 기적의 매매법 🐜

src/main/kotlin/heejik/13week/🐜 기적의 매매법 🐜.kt

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+package heejik.`13week`
+
+class `🐜 기적의 매매법 🐜` {
+
+    fun solve() {
+        val money = readln().toInt()
+        val stocks = readln().split(' ').map { it.toInt() }
+
+        val bnf = bnf(money, stocks)
+        val timing = timing(money, stocks)
+
+        println(
+            if (bnf > timing) "BNP"
+            else if (timing > bnf) "TIMING"
+            else "SAMESAME"
+        )
+    }
+
+    private fun bnf(_money: Int, stocks: List<Int>): Int {
+        var money = _money
+        var stock = 0
+
+        stocks.forEach {
+            val cnt = money / it
+            money -= it * (cnt)
+            stock += cnt
+        }
+
+        return money + (stock * stocks.last())
+    }
+
+    private fun timing(_money: Int, stocks: List<Int>): Int {
+        var money = _money
+        var stock = 0
+
+        var upCnt = 0
+        var downCnt = 0
+        var preStock = stocks.first()
+
+        stocks.drop(0).forEach {
+            if (it > preStock) {
+                upCnt++
+                downCnt = 0
+            } else if (it < preStock) {
+                downCnt++
+                upCnt = 0
+            } else {
+                upCnt = 0
+                downCnt = 0
+            }
+
+            if (upCnt >= 3) {
+                money += stock * it
+                stock = 0
+            }
+            if (downCnt >= 3) {
+                val cnt = money / it
+                money -= it * (cnt)
+                stock += cnt
+            }
+
+            preStock = it
+        }
+
+        return money + (stock * stocks.last())
+    }
+}
+
+fun main() {
+    `🐜 기적의 매매법 🐜`().solve()
+}