Add more solutions

Added solutions for problems 26, 27, 28, 29 and 30, both in C
and python

Python/p026.py

@@ -0,0 +1,43 @@
+#!/usr/bin/python3
+
+from timeit import default_timer
+
+def main():
+    start = default_timer()
+
+    max_ = 0
+
+    for i in range(2, 1000):
+        j = i
+
+        while j % 2 == 0 and j > 1:
+            j = j // 2
+
+        while j % 5 == 0 and j > 1:
+            j = j // 5
+
+        k = 9
+
+        if j == 1:
+            n = 0
+        else:
+            n = 1
+            div = j
+            while k % div != 0:
+                n = n + 1
+                k = k * 10
+                k = k + 9
+
+            if n > max_:
+                max_ = n
+                max_n = i
+
+    end = default_timer()
+
+    print('Project Euler, Problem 26')
+    print('Answer: {}'.format(max_n))
+
+    print('Elapsed time: {:.9f} seconds'.format(end - start))
+
+if __name__ == '__main__':
+    main()

Python/p027.py

@@ -0,0 +1,38 @@
+#!/usr/bin/python3
+
+from timeit import default_timer
+from projecteuler import is_prime
+
+def main():
+    start = default_timer()
+
+    max_ = 0
+
+    for a in range(-999, 1000):
+        for b in range(2, 1001):
+            n = 0
+            count = 0
+
+            while True:
+                p = n * n + a * n + b
+
+                if p > 1 and is_prime(p):
+                    count = count + 1
+                    n = n + 1
+                else:
+                    break
+
+            if count > max_:
+                max_ = count
+                save_a = a
+                save_b = b
+
+    end = default_timer()
+
+    print('Project Euler, Problem 27')
+    print('Answer: {}'.format(save_a * save_b))
+
+    print('Elapsed time: {:.9f} seconds'.format(end - start))
+
+if __name__ == '__main__':
+    main()

Python/p028.py

@@ -0,0 +1,30 @@
+#!/usr/bin/python3
+
+from timeit import default_timer
+
+def main():
+    start = default_timer()
+
+    limit = 1001 * 1001
+
+    i = 0
+    j = 1
+    step = 0
+    sum_ = 1
+
+    while j < limit:
+        if i == 0:
+            step = step + 2
+        j = j + step
+        sum_ = sum_ + j
+        i = (i + 1) % 4
+
+    end = default_timer()
+
+    print('Project Euler, Problem 28')
+    print('Answer: {}'.format(sum_))
+
+    print('Elapsed time: {:.9f} seconds'.format(end - start))
+
+if __name__ == '__main__':
+    main()

Python/p029.py

@@ -0,0 +1,34 @@
+#!/usr/bin/python3
+
+from numpy import zeros
+
+from timeit import default_timer
+
+def main():
+    start = default_timer()
+
+    powers = zeros(9801)
+
+    for i in range(2, 101):
+        a = i
+        for j in range(2, 101):
+            powers[(i-2)*99+j-2] = a ** j
+
+    powers = list(powers)
+    powers.sort()
+    
+    count = 1
+
+    for i in range(1, 9801):
+        if powers[i] != powers[i-1]:
+            count = count + 1
+
+    end = default_timer()
+
+    print('Project Euler, Problem 29')
+    print('Answer: {}'.format(count))
+
+    print('Elapsed time: {:.9f} seconds'.format(end - start))
+
+if __name__ == '__main__':
+    main()

Python/p030.py

@@ -0,0 +1,32 @@
+#!/usr/bin/python3
+
+from numpy import zeros
+
+from timeit import default_timer
+
+def main():
+    start = default_timer()
+
+    tot = 0
+
+    for i in range(10, 354295):
+        j = i
+        sum_ = 0
+
+        while j > 0:
+            digit = j % 10
+            sum_ = sum_ + digit ** 5
+            j = j // 10
+
+        if sum_ == i:
+            tot = tot + i
+
+    end = default_timer()
+
+    print('Project Euler, Problem 30')
+    print('Answer: {}'.format(tot))
+
+    print('Elapsed time: {:.9f} seconds'.format(end - start))
+
+if __name__ == '__main__':
+    main()