Add type hints in problems 1-10

Python/p001.py

@@ -8,7 +8,7 @@ from projecteuler import timing
 
 
 @timing
-def p001():
+def p001() -> None:
     sum_ = 0
 
     # Simple brute-force approach: try every number between 3 and 999,

Python/p002.py

@@ -10,7 +10,7 @@ from projecteuler import timing
 
 
 @timing
-def p002():
+def p002() -> None:
     N = 4000000
 
     fib1 = 1

Python/p003.py

@@ -10,7 +10,7 @@ from projecteuler import is_prime, timing
 # Recursive approach: if num is prime, return num, otherwise
 # recursively look for the largest prime factor of num divided
 # by its prime factors until only the largest remains.
-def max_prime_factor(num):
+def max_prime_factor(num: int) -> int:
     # Use function defined in projecteuler.py to check if a number is prime.
     if is_prime(num):
         return num
@@ -34,7 +34,7 @@ def max_prime_factor(num):
 
 
 @timing
-def p003():
+def p003() -> None:
     res = max_prime_factor(600851475143)
 
     print('Project Euler, Problem 3')

Python/p004.py

@@ -8,7 +8,7 @@ from projecteuler import is_palindrome, timing
 
 
 @timing
-def p004():
+def p004() -> None:
     max_ = 0
 
     # Using a brute-force approach: generate every product of 3-digit numbers

Python/p005.py

@@ -8,7 +8,7 @@ from projecteuler import lcmm, timing
 
 
 @timing
-def p005():
+def p005() -> None:
     values = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
               11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
 

Python/p006.py

@@ -16,7 +16,7 @@ from projecteuler import timing
 
 
 @timing
-def p006():
+def p006() -> None:
     sum_squares = 0
     square_sum = 0
 

Python/p007.py

@@ -8,7 +8,7 @@ from projecteuler import is_prime, timing
 
 
 @timing
-def p007():
+def p007() -> None:
     count = 1
     n = 1
 

Python/p008.py

@@ -29,7 +29,7 @@ from projecteuler import timing
 
 
 @timing
-def p008():
+def p008() -> None:
     number = '73167176531330624919225119674426574742355349194934' +\
              '96983520312774506326239578318016984801869478851843' +\
              '85861560789112949495459501737958331952853208805511' +\
@@ -53,7 +53,7 @@ def p008():
     # Transform the string into a list of integers
     number = list(map(int, number))
 
-    max_ = 0
+    _max = 0
 
     # Calculate all the 13-digit products, and save the maximum
     for i in range(1000-13):
@@ -63,11 +63,10 @@ def p008():
         for j in curr:
             prod = prod * j
 
-        if prod > max_:
+        _max = max(_max, prod)
-            max_ = prod
 
     print('Project Euler, Problem 8')
-    print(f'Answer: {max_}')
+    print(f'Answer: {_max}')
 
 
 if __name__ == '__main__':

Python/p009.py

@@ -15,7 +15,7 @@ from projecteuler import timing
 
 
 @timing
-def p009():
+def p009() -> None:
     found = 0
 
     m = 2
@@ -34,6 +34,7 @@ def p009():
 
                 if a + b + c == 1000:
                     found = 1
+
                     break
 
                 i = 2
@@ -48,6 +49,7 @@ def p009():
                         b = tmpb
                         c = tmpc
                         found = 1
+
                         break
 
                     if tmpa + tmpb + tmpc > 1000:

Python/p010.py

@@ -8,7 +8,7 @@ from projecteuler import sieve, timing
 
 
 @timing
-def p010():
+def p010() -> None:
     N = 2000000
 
     # Use the function in projecteuler.py implementing the