fix generateTriangle method

src/main/java/MainExercises.java

@@ -2,22 +2,30 @@ public class MainExercises
 {
     public char[][] generateTriangle(int n) {
 
-        char[][] result = new char[n][n];
+        char[][] result = new char[n][];
         
         for (int i = 0; i < n; i++)
         {
-            if (i == n-1)
+            char[] line = new char[i+1];
+
+            if (i == n-1 || i == 0)
             {
                 for (int j = 0; j <= i; j++)
                 {
-                    result[i][j] = '*';
+                    line[j] = '*';
                 }
             }
             else 
             {
-                result[i][0] = '*';
+                line[0] = '*';
-                result[i][i] = '*';
+                line[i] = '*';
+
+                for (int j = i - 1; j > 0; j--) {
+                    line[j] = ' ';
+                }
             }
+
+            result[i] = line;
         }
 
         return result;