git reimport

archive/2018.04/2018.04.07 - unsorted/TaskB.java

@@ -0,0 +1,50 @@
+package chelper;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import io.InputReader;
+import io.OutputWriter;
+import misc.GCJSolution;
+import misc.SimpleSavingChelperSolution;
+
+
+public class TaskB extends GCJSolution {
+
+  public void solve(int testNumber, InputReader in, OutputWriter out) {
+    wrapSolve(testNumber, in, out);
+  }
+
+  @Override
+  public void solve(int testNumber) {
+    int n = in.nextInt();
+    int[] a = in.nextIntArray(n);
+
+    List<Integer> even = new ArrayList<>();
+    List<Integer> odd = new ArrayList<>();
+
+    for (int i = 0; i < n; i++) {
+      if (i % 2 == 0) {
+        even.add(a[i]);
+      } else {
+        odd.add(a[i]);
+      }
+    }
+
+    Collections.sort(even);
+    Collections.sort(odd);
+
+    for (int i = 0; i < n - 1; i++) {
+      int x = i % 2 == 0 ? even.get(i / 2) : odd.get(i / 2);
+      int y = (i + 1) % 2 == 0 ? even.get((i + 1) / 2) : odd.get((i + 1) / 2);
+
+      if (x > y) {
+        out.println(i);
+        return;
+      }
+    }
+
+    out.println("OK");
+  }
+}