git reimport

archive/2017.04/2017.04.08 - unsorted/TaskB.java

@@ -0,0 +1,53 @@
+package chelper;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import io.InputReader;
+import io.OutputWriter;
+import misc.GCJSolution;
+
+
+public class TaskB extends GCJSolution {
+
+  public void solve(int testNumber, InputReader in, OutputWriter out) {
+    wrapSolve(testNumber, in, out);
+  }
+
+  long parse(char[] s) {
+    return Long.parseLong(new String(s));
+  }
+
+  boolean isGood(char[] s) {
+    char[] s2 = Arrays.copyOf(s, s.length);
+    Arrays.sort(s2);
+    return Arrays.equals(s, s2);
+  }
+
+  @Override
+  public void solve(int testNumber) {
+    char[] s = in.nextString().toCharArray();
+
+    List<char[]> vars = new ArrayList<>();
+
+    vars.add(Arrays.copyOf(s, s.length));
+
+    for (int i = 0; i < s.length; i++) {
+      char[] s2 = Arrays.copyOf(s, s.length);
+
+      if (s[i] >= '1') {
+        s2[i] = (char) (s[i] - 1);
+        for (int j = i + 1; j < s.length; j++) {
+          s2[j] = '9';
+        }
+        vars.add(s2);
+      }
+    }
+
+    vars = vars.stream().filter(this::isGood).sorted((o1, o2) -> Long.compare(parse(o1), parse(o2))).collect(Collectors.toList());
+
+    out.println(parse(vars.get(vars.size() - 1)));
+  }
+}