Updated label_queen_conflicts function (#967)

Shortened it, finding conflicts separately and storing them in different variables has no use later in the notebook; so i believe this looks better.

Author: mkhalid1

csp.ipynb

@@ -2821,19 +2821,13 @@
     "def label_queen_conflicts(assignment,grid):\n",
     "    ''' Mark grid with queens that are under conflict. '''\n",
     "    for col, row in assignment.items(): # check each queen for conflict\n",
-    "        row_conflicts = {temp_col:temp_row for temp_col,temp_row in assignment.items() \n",
-    "                         if temp_row == row and temp_col != col}\n",
-    "        up_conflicts = {temp_col:temp_row for temp_col,temp_row in assignment.items() \n",
-    "                        if temp_row+temp_col == row+col and temp_col != col}\n",
-    "        down_conflicts = {temp_col:temp_row for temp_col,temp_row in assignment.items() \n",
-    "                          if temp_row-temp_col == row-col and temp_col != col}\n",
+    "        conflicts = {temp_col:temp_row for temp_col,temp_row in assignment.items() \n",
+    "                         if (temp_row == row and temp_col != col\n",
+    "                          or (temp_row+temp_col == row+col and temp_col != col)\n",
+    "                          or (temp_row-temp_col == row-col and temp_col != col)}\n",
     "        \n",
     "        # Place a 3 in positions where this is a conflict\n",
-    "        for col, row in row_conflicts.items():\n",
-    "                grid[col][row] = 3\n",
-    "        for col, row in up_conflicts.items():\n",
-    "                grid[col][row] = 3\n",
-    "        for col, row in down_conflicts.items():\n",
+    "        for col, row in conflicts.items():\n",
     "                grid[col][row] = 3\n",
     "\n",
     "    return grid\n",