Finish assignments for course 2

misc/two_sums.py

@@ -0,0 +1,25 @@
+
+def two_sum(t, xs_list, xs_set):
+    for x in xs:
+        y = t - x
+        if x != y and y in xs_set:
+            return True
+    return False
+
+
+if __name__ == "__main__":
+    with open("../data/c2a4.txt") as f:
+        xs = list(map(int, f.readlines()))
+
+    xs_min = [x for x in xs if x < 0]
+    xs_max_set = set([x for x in xs if x > 0])
+
+    limit = 10000
+    two_sums = 0
+    for t in range(-limit, limit + 1):
+        if t % 10 == 0:
+            print(t)
+        if two_sum(t, xs_min, xs_max_set):
+            two_sums += 1
+
+    print(two_sums)