Solve problem 84 and clean up a little

euler.sublime-project

@@ -1,20 +0,0 @@
-{
-	"build_systems":
-	[
-		{
-			"file_regex": "^[ ]*File \"(...*?)\", line ([0-9]*)",
-			"name": "Anaconda Python Builder",
-			"selector": "source.python",
-			"shell_cmd": "\"python\" -u \"$file\""
-		}
-	],
-	"folders":
-	[
-		{
-			"path": "python"
-		},
-		{
-			"path": "txt"
-		}
-	]
-}

python/e084.py

@@ -1,8 +1,143 @@
+from random import randint
+from dataclasses import dataclass
 
-def euler_084():
-    return 0
+@dataclass
+class State:
+    current_field: int
+    consecutive_doubles: int
+    current_cc: int
+    current_ch: int
+
+NUMBER_OF_FIELDS = 40
+DICE_SIDES = 4
+NUMBER_OF_ROLLS = 10**5
+NUMBER_OF_CARDS = 16
+
+GO = 0
+CC1 = 2
+T1 = 4
+R1 = 5
+CH1 = 7
+JAIL = 10
+C1 = 11
+U1 = 12
+R2 = 15
+CC2 = 17
+D3 = 19
+CH2 = 22
+E3 = 24
+R3 = 25
+U2 = 28
+G2J = 30
+CC3 = 33
+R4 = 35
+CH3 = 36
+H2 = 39
+
+# special identifier for chance cards
+NR = 100
+NU = 101
+B3 = 102
+
+CC_CARDS = [GO, JAIL] + [None for i in range(NUMBER_OF_CARDS - 2)]
+CH_CARDS = [GO, JAIL, C1, E3, H2, R1, NR, NR, NU, B3] \
+           + [None for i in range(NUMBER_OF_CARDS - 10)]
+
+
+def roll_two_dices():
+    return (randint(1, DICE_SIDES), randint(1, DICE_SIDES))
+
+
+def next_state_cc(cc_field, state):
+    next_field = CC_CARDS[state.current_cc]
+    state.current_cc = (state.current_cc + 1) % NUMBER_OF_CARDS
+
+    if next_field is None:
+        state.current_field = cc_field
+    else:
+        state.current_field = next_field
+    return state
+
+
+def next_state_ch(ch_field, state):
+    next_field = CH_CARDS[state.current_ch]
+    state.current_ch = (state.current_ch + 1) % NUMBER_OF_CARDS
+
+    if next_field is None:
+        state.current_field = ch_field
+    elif next_field == NR:
+        if ch_field == CH1:
+            state.current_field = R2
+        elif ch_field == CH2:
+            state.current_field = R3
+        elif ch_field == CH3:
+            state.current_field = R1
+    elif next_field == NU:
+        if ch_field == CH1:
+            state.current_field = U1
+        elif ch_field == CH2:
+            state.current_field = U2
+        elif ch_field == CH3:
+            state.current_field = U1
+    elif next_field == B3:
+        if ch_field == CH1:
+            state.current_field = T1
+        elif ch_field == CH2:
+            state.current_field = D3
+        elif ch_field == CH3:
+            state.current_field = CC3
+            return next_state_cc(state.current_field, state)
+    else:
+        state.current_field = next_field
+    return state
+
+
+def next_state(state):
+    next_field = None
+
+    d1, d2 = roll_two_dices()
+    if d1 == d2:
+        state.consecutive_doubles += 1
+    else:
+        state.consecutive_doubles = 0
+
+    if state.consecutive_doubles == 3:
+        state.consecutive_doubles = 0
+        state.current_field = JAIL
+        return state
+
+    next_field = (state.current_field + d1 + d2) % NUMBER_OF_FIELDS
+    if next_field == G2J:
+        next_field = JAIL
+    elif next_field in [CC1, CC2, CC3]:
+        return next_state_cc(next_field, state)
+    elif next_field in [CH1, CH2, CH3]:
+        return next_state_ch(next_field, state)
+
+    state.current_field = next_field
+    return state
+
+
+def euler_085():
+    state = State(GO, 0, 0, 0)
+    accesses_per_field = [0 for _ in range(NUMBER_OF_FIELDS)]
+
+    for _ in range(NUMBER_OF_ROLLS):
+        state = next_state(state)
+        accesses_per_field[state.current_field] += 1
+
+    p_field = [(float(a) / NUMBER_OF_ROLLS * 100, i)
+                for i, a in enumerate(accesses_per_field)]
+    p_field.sort(reverse=True)
+    solution = ""
+    for p, i in p_field[:3]:
+        solution += "{:2d}".format(i)
+
+    return solution
 
 
 if __name__ == "__main__":
-    print("e084.py: " + str(euler_084()))
-    assert(euler_084() == 0)
+    solution = euler_085()
+    print("e085.py: " + str(solution))
+    assert(solution == "101524")
+

python/lib_create_templates.py

@@ -1,4 +1,4 @@
-FROM = 77
+FROM = 85
 TILL = 85
 
 template = """
@@ -7,8 +7,9 @@ def euler_XXX():
 
 
 if __name__ == "__main__":
-    print("eXXX.py: " + str(euler_XXX()))
-    assert(euler_XXX() == 0)
+    solution = euler_XXX()
+    print("eXXX.py: " + str(solution))
+    assert(solution == 0)
 """