complete 33983.kt

storage/zeta/kt/completed/33983.kt

@@ -0,0 +1,42 @@
+fun isPureWaterString(s: String): Boolean {
+    if (s.length % 3 != 0) {
+        return false
+    }
+    var leftCntH = 0
+    var rightCntH = 0
+    var leftCntO = 0
+    var rightCntO = 0
+
+    for ((left, right) in s zip s.reversed()) {
+        when (left) {
+            'H' -> leftCntH++
+            'O' -> leftCntO++
+        }
+
+        when (right) {
+            'H' -> rightCntH++
+            'O' -> rightCntO++
+        }
+
+        if (leftCntO > leftCntH) {
+            return false
+        }
+
+        if (rightCntO > rightCntH) {
+            return false
+        }
+    }
+
+    return leftCntH == leftCntO * 2
+}
+
+
+fun main() = with(System.`in`.bufferedReader()) {
+    this.readLine()
+    val s = this.readLine()
+    if (isPureWaterString(s)) {
+        println("pure")
+    } else {
+        println("mix")
+    }
+}