git reimport

archive/2017.04/2017.04.30 - unsorted/TaskC.java

@@ -0,0 +1,58 @@
+package chelper;
+
+import io.InputReader;
+import io.OutputWriter;
+import misc.GCJSolution;
+import misc.SimpleSavingChelperSolution;
+
+
+public class TaskC extends GCJSolution {
+
+  public void solve(int testNumber, InputReader in, OutputWriter out) {
+    wrapSolve(testNumber, in, out);
+  }
+
+  double eps = 1e-9;
+
+  @Override
+  public void solve(int testNumber) {
+    int n = in.nextInt();
+    int k = in.nextInt();
+
+    double u = in.nextDouble();
+    double[] a = in.nextDoubleArray(n);
+
+    double min = 1.0;
+    for (double v : a) {
+      min = Math.min(v, min);
+    }
+
+    double l = 0.0;
+    double r = 1.1;
+    double goodAns = 0.0;
+
+    while (r - l > eps) {
+      double m = (r + l) / 2;
+      double ma = Math.min(m, 1.0);
+
+      double uLeft = u;
+      double ans = 1;
+
+      for (double v : a) {
+        double uNeed = Math.max(0, ma - v);
+        uLeft -= uNeed;
+//        ans *= ma;
+        ans *= Math.max(ma, v);
+      }
+
+      if (uLeft >= 0) {
+        l = m;
+        goodAns = Math.max(goodAns, ans);
+      } else {
+        r = m;
+      }
+    }
+
+    out.println(goodAns);
+  }
+}