Complete first day

1.1.py

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+lines = []
+
+with open("1.input") as f:
+    for line in f.readlines():
+        lines.append(int(line))
+
+for l1 in lines:
+    for l2 in lines:
+        for l3 in lines:
+            if l1 + l2 + l3 == 2020:
+                print(l1 * l2 * l3)

1.input

@@ -0,0 +1,200 @@
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1.py

@@ -0,0 +1,10 @@
+lines = []
+
+with open("1.input") as f:
+    for line in f.readlines():
+        lines.append(int(line))
+
+for l1 in lines:
+    for l2 in lines:
+        if l1 + l2 == 2020:
+            print(l1 * l2)