Added 2017/13 part 2

2017/13/13.md

@@ -193,8 +193,6 @@ immediately, *what is the severity of your whole trip*?
 
 Your puzzle answer was `1844`.
 
-The first half of this puzzle is complete! It provides one gold star: \*
-
 ## \-\-- Part Two \-\-- {#part2}
 
 Now, you need to pass through the firewall without being caught - easier
@@ -320,7 +318,13 @@ picoseconds you would need to delay to get through safely is `10`.
 *What is the fewest number of picoseconds* that you need to delay the
 packet to pass through the firewall without being caught?
 
-Answer:
+Your puzzle answer was `3897604`.
 
-Although it hasn\'t changed, you can still [get your puzzle
+Both parts of this puzzle are complete! They provide two gold stars:
+\*\*
+
+At this point, you should [return to your Advent calendar](/2017) and
+try another puzzle.
+
+If you still want to see it, you can [get your puzzle
 input](13/input).

2017/13/solution.py

@@ -6,7 +6,7 @@ from fred import list2int, ppprint
 
 input_f = 'input'
 
-part = 2
+part = 3
 
 #########################################
 #                                       #
@@ -16,8 +16,6 @@ part = 2
 
 grid = []
 
-
-
 if part == 1:
     for i in range(0,100):
         grid.append([])
@@ -103,7 +101,7 @@ if part == 1:
 #                                       #
 #########################################
 if part == 2:
-    grid_length = 100
+    grid_length = 7
     for i in range(0,grid_length):
         grid.append([])
     with open(input_f) as file:
@@ -115,6 +113,8 @@ if part == 2:
     count = 0
     hit = []
 
+    debug = 0
+
     direction = 1
 
     packet_loc = 0
@@ -144,11 +144,12 @@ if part == 2:
             #print(packet_loc,scanner_loc)
 
             for idx,i in enumerate(grid):
+                debug += 1      
                 
                 if scanner_loc[idx] == 0 and packet_loc == idx:
-                    hit.append(idx)
-                    #print('Got hit at',idx)
-                    got_hit = True
+                   hit.append(idx)
+                   print('Got hit at',idx)
+                   got_hit = True
                 elif len(grid[idx]) != 0:
                     loc = scanner_loc[idx] % len(grid[idx])
                     scanner_loc[idx] += directions[idx]
@@ -158,9 +159,12 @@ if part == 2:
                         directions[idx] = 1
                 if got_hit:
                     break
+            #print(grid)
             packet_loc += 1
+
         if len(hit) == 0:
             print(abs(start_loc))
+            print('Debug:',debug)
             break
         #input()
     #print(hit)
@@ -171,3 +175,49 @@ if part == 2:
     #print(damage)
         
     
+
+if part == 3:
+    grid_length = 100
+    scanners = {}
+    for i in range(0,grid_length):
+        grid.append([])
+    with open(input_f) as file:
+        for line in file:
+            l = line.rstrip().split(': ')
+            l = list2int(l)
+            for i in range(0,l[1]):
+                grid[l[0]].append('[ ]')
+
+    for idx,i in enumerate(grid):
+        scanners[idx] = len(i)
+
+    debug = 0
+    damage = 0
+    delay = 0
+    End = False
+
+
+    while not End:
+        damage = False
+        for spot, range in enumerate(grid):
+            debug += 1
+            #print(spot%(2*(scanners[spot]-1)))
+            
+            if not (delay+spot)%(2*(len(range)-1)) and len(range) > 0:
+                #print('hit at ', spot)
+                damage += 1
+                break
+        if damage:
+            delay += 1
+        else:
+            End = True
+                
+            #print('-----')
+        #print()
+        #print('debug',debug)
+        #input()    
+    print(debug)
+    print(delay)
+    #pprint(grid)
+    #print(scanners)
+