git reimport

archive/2018.09/2018.09.18 - unsorted/Task2.java

@@ -0,0 +1,50 @@
+package chelper;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import io.InputReader;
+import io.OutputWriter;
+import misc.SimpleSavingChelperSolution;
+
+
+public class Task2 extends SimpleSavingChelperSolution {
+
+  public void solve(int testNumber, InputReader in, OutputWriter out) {
+    wrapSolve(testNumber, in, out);
+  }
+
+  List<Integer> piramidSizes = new ArrayList<>();
+  int max = 300_001;
+  int[] dp = new int[max];
+
+  {
+    piramidSizes.add(0);
+    for (int i = 1; true; i++) {
+      piramidSizes.add(piramidSizes.get(i - 1) + (1 + i) * i / 2);
+      if (piramidSizes.get(i) >= max) {
+        break;
+      }
+    }
+
+    Arrays.fill(dp, max);
+    dp[0] = 0;
+    for (int i = 1; i < max; i++) {
+      for (int j : piramidSizes) {
+        if (j > i) {
+          break;
+        }
+        dp[i] = Math.min(dp[i], dp[i - j] + 1);
+      }
+    }
+  }
+
+  @Override
+  public void solve(int testNumber) {
+
+    int x = in.nextInt();
+    out.println(dp[x]);
+
+  }
+}