Data commit

Task/Abbreviations-automatic/Groovy/abbreviations-automatic.groovy

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+class Abbreviations {
+    static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("days_of_week.txt"), "utf-8"))
+        List<String> readAllLines = br.readLines()
+
+        for (int i = 0; i < readAllLines.size(); i++) {
+            String line = readAllLines.get(i)
+            if (line.length() == 0) continue
+
+            String[] days = line.split(" ")
+            if (days.length != 7) throw new RuntimeException("There aren't 7 days on line " + (i + 1))
+
+            Map<String, Integer> temp = new HashMap<>()
+            for (String day : days) {
+                Integer count = temp.getOrDefault(day, 0)
+                temp.put(day, count + 1)
+            }
+            if (temp.size() < 7) {
+                System.out.print(" ∞  ")
+                System.out.println(line)
+                continue
+            }
+
+            int len = 1
+            while (true) {
+                temp.clear()
+                for (String day : days) {
+                    String sd
+                    if (len >= day.length()) {
+                        sd = day
+                    } else {
+                        sd = day.substring(0, len)
+                    }
+                    Integer count = temp.getOrDefault(sd, 0)
+                    temp.put(sd, count + 1)
+                }
+                if (temp.size() == 7) {
+                    System.out.printf("%2d  %s\n", len, line)
+                    break
+                }
+                len++
+            }
+        }
+    }
+}