Solution for assignment1.

script.js

@@ -1,12 +1,16 @@
 const ASSIGNMENT = 'assignment';
 const ANSWER = 'answer';
+const ALGORITHM_CHECKBOX = 'algorithm';
 const NEWLINE_CHARACTER = '\n';
+const TOP_1 = 1;
+const TOP_N = 3;
 
 /**
  * Main function
  */
 window.onload = function() {
     document.getElementById(ASSIGNMENT).addEventListener("input", calculateAnswer);
+    document.getElementById(ALGORITHM_CHECKBOX).addEventListener("click", calculateAnswer);
 }
 
 /**
@@ -15,19 +19,52 @@ window.onload = function() {
  */
 function calculateAnswer(event) {
   console.info("Calculating answer for input...");
-  let answer = algorithm(event.target.value);
+  let assignment = document.getElementById(ASSIGNMENT).value;
+  let top3 = document.getElementById(ALGORITHM_CHECKBOX).checked;
+  let answer = algorithm(assignment, (top3)? TOP_N: 1);
 
   document.getElementById(ANSWER).innerText = answer;
 }
 
 /**
- * Calculate the answer to assignment.
+ * Calculate the answer to assignment1 with 2 variables, count and highest.
  * @param assignment the input from the assignment.
- * @return string the answer
+ * @param topn the
+ * @return string the elf with the highest calory count
  */
-function algorithm(assignment) {
+function algorithm(assignment, topn) {
+    let currentCalorieScore = 0;
+    let highestCalorieScores = Array.from({length: topn}, () => (0));
+    let currentElf = 1;
+
     let lines = assignment.trim().split(NEWLINE_CHARACTER);
     console.info("Linecount:" + lines.length);
 
-    // TODO: implement assignment
+    for(var i = 0; i < lines.length; i++){
+        let line = lines[i];
+
+        if(!line && currentCalorieScore > 0) { // Check for empty line and skip subsequent emptylines
+            console.debug("Calculated score for elf " + currentElf + ": " + currentCalorieScore);
+
+            for(let j=0; j < highestCalorieScores.length; j++) {
+                if(currentCalorieScore > highestCalorieScores[j]) {
+                    console.debug("New highest #"+(j+1) + " elf found, with score:" + currentCalorieScore);
+                    let oldHighestCalorieScore = highestCalorieScores[j];
+                    highestCalorieScores[j] = currentCalorieScore;
+                    currentCalorieScore = oldHighestCalorieScore;
+                }
+            }
+
+            // Reset values
+            currentCalorieScore = 0;
+            currentElf++;
+            continue;
+        }
+            
+        let calorieScore = parseInt(line);
+        currentCalorieScore += calorieScore;
+    }
+
+    console.debug(highestCalorieScores);
+    return "The highest of sum of calorie amount: " + highestCalorieScores.reduce(function(a, b) { return a + b; }, 0);
 }