Merge pull request #4290 from Abigail/abigail/week-117

Go solutions for week 117

2 files changed, 74 insertions, 0 deletions

diff --git a/challenge-117/abigail/java/ch-1.java b/challenge-117/abigail/java/ch-1.java
new file mode 100644
index 0000000000..6a03391c2e
--- /dev/null
+++ b/challenge-117/abigail/java/ch-1.java
@@ -0,0 +1,43 @@
+//
+// See ../README.md
+//
+
+//
+// Run as: ln ch-1.java ch1.java; javac ch1.java; java ch1 < input-file
+//
+
+import java.util.*;
+
+public class ch1 {
+    public static void main (String [] args) {
+        Scanner scanner = new Scanner (System . in);
+        int sum    = 0;
+        int SUM_15 = 120;
+        try {
+            while (true) {
+                String line = scanner . nextLine ();
+                //
+                // Googling suggest Java has a gazillion methods to
+                // convert string to integers -- and they all crap
+                // out if the string starts with a number, and has
+                // anything trailing. None of them actually similate atoi.
+                // 
+                // So, handrolling it is!
+                //
+                int i, n = 0;
+                for (i = 0; i < line . length (); i ++) {
+                    if (line . charAt (i) < "0" . charAt (0) ||
+                        line . charAt (i) > "9" . charAt (0)) {
+                        break;
+                    }
+                    n *= 10;
+                    n += line . charAt (i) - "0" . charAt (0);
+                }
+                sum += n;
+            }
+        }
+        catch (Exception e) {
+            System . out . println (SUM_15 - sum);
+        }
+    }
+}
diff --git a/challenge-117/abigail/java/ch-2.java b/challenge-117/abigail/java/ch-2.java
new file mode 100644
index 0000000000..05ebce2e86
--- /dev/null
+++ b/challenge-117/abigail/java/ch-2.java
@@ -0,0 +1,31 @@
+//
+// See ../README.md
+//
+
+//
+// Run as: ln ch-2.java ch2.java; javac ch2.java; java ch2 < input-file
+//
+
+import java.util.*;
+
+
+public class ch2 {
+    static void steps (int x, int y, String path) {
+        if (x == 0 && y == 0) {
+            System . out . println (path);
+        }
+        if (x > 0) {
+            steps (x - 1, y + 1, path + "L");
+            steps (x - 1, y,     path + "R");
+        }
+        if (y > 0) {
+            steps (x,     y - 1, path + "H");
+        }
+    }
+
+    public static void main (String [] args) {
+        Scanner scanner = new Scanner (System . in);
+        int size = scanner . nextInt ();
+        steps (size, 0, "");
+    }
+}