Day03 initial commit

Signed-off-by: Eoghan Conlon <git@eoghanconlon.ie>

src/Day03.java

@@ -0,0 +1,51 @@
+import java.io.IOException;
+
+public class Day03 extends Input {
+    private Input input;
+
+    public Day03() throws IOException {
+        input = new Input();
+        input.init("in/Day03");
+    }
+
+    public int part1_sample(){
+        int rValue = 0;
+
+        String input = this.input.getSample_input().getFirst();
+        String pattern = "mul(";
+        String num1_s = "";
+        String num2_s = "";
+        String nums = "0123456789";
+        int num = 1;
+        int pattern_cnt = 0;
+        for(int i = 0; i < input.length(); i += 1){
+            if(pattern_cnt != pattern.length()) {
+                if (input.charAt(i) == pattern.charAt(pattern_cnt)) {
+                    pattern_cnt += 1;
+                } else {
+                    pattern_cnt = 0;
+                }
+            } else {
+                if(nums.contains(Character.toString(input.charAt(i)))){
+                    if(num == 1){
+                        num1_s += input.charAt(i);
+                    } else if (num == 2) {
+                        num2_s += input.charAt(i);
+                    } else {
+                        System.err.println("Something went wrong");
+                    }
+                } else if (input.charAt(i) == ',' && num == 1){
+                    num += 1;
+                } else if (input.charAt(i) == ')' && num == 2){
+                    int num1 = Integer.parseInt(num1_s);
+                    int num2 = Integer.parseInt(num2_s);
+                    rValue += (num1 * num2);
+                    num = 1;
+                    pattern_cnt = 0;
+                }
+            }
+        }
+
+        return rValue;
+    }
+}

src/Main.java

@@ -24,10 +24,21 @@ public class Main {
         int d1_p2_answer = day01.Part2();
         long day01_p2 = System.currentTimeMillis() - start;
 
+        start = System.currentTimeMillis();
+        Day03 day03 = new Day03();
+        long day03_init = System.currentTimeMillis() - start;
+
+        start = System.currentTimeMillis();
+        int day03_p1_sample = day03.part1_sample();
+        long day03_p1_sample_t = System.currentTimeMillis() - start;
+
         System.out.printf("Day 1 init took %dms", day01_init);
         System.out.printf("Part 1 sample is: %d (%dms)\n", sample_d1_p1_answer, day01_p1_sample);
         System.out.printf("Part 1 answer is: %d (%dms)\n", d1_p1_answer, day01_p1);
         System.out.printf("Part 2 sample answer is: %d (%dms)\n", sample_d1_p2_answer, day01_p2_sample);
-        System.out.printf("Part 2 answer is: %d (%dms)", d1_p2_answer, day01_p2);
+        System.out.printf("Part 2 answer is: %d (%dms)\n", d1_p2_answer, day01_p2);
+
+        System.out.printf("Day 3 init took %dms\n", day03_init);
+        System.out.printf("Day 3 part 1 (sample): %d (%dms)\n", day03_p1_sample, day03_p1_sample_t);
     }
 }