feat: solutions add solutions for c1-3

solutions/1.py

@@ -0,0 +1,30 @@
+from io import TextIOWrapper
+import socket
+
+REMOTE = "127.0.0.1"
+PORT = 1337
+
+def main() -> int:
+    s = socket.socket()
+    s.connect((REMOTE, PORT))
+    sf: TextIOWrapper = s.makefile('rw')
+
+    _response: str = recv(sf)
+
+    sf.close()
+    return 0
+
+def send(sf: TextIOWrapper, msg: str) -> int:
+    print(f"> {msg}")
+    sent: int = sf.write(f"{msg}\n")
+    sf.flush()
+    return sent
+
+def recv(sf: TextIOWrapper) -> str:
+    response = sf.readline().strip()
+    print(f"< {response}")
+    return response
+
+
+if __name__ == "__main__":
+    exit(main())

solutions/2.py

@@ -0,0 +1,32 @@
+from io import BufferedRWPair
+import socket
+
+REMOTE = "127.0.0.1"
+PORT = 1337
+
+def main() -> int:
+    s = socket.socket()
+    s.connect((REMOTE, PORT))
+    sf: BufferedRWPair = s.makefile('rwb')
+
+    pl = int.to_bytes(1337, 2, "big")
+
+    _ = send(sf, pl)
+
+    sf.close()
+    return 0
+
+def send(sf: BufferedRWPair, msg: bytes) -> int:
+    print(f"> {msg.hex()}")
+    sent: int = sf.write(msg + b"\n")
+    sf.flush()
+    return sent
+
+def recv(sf: BufferedRWPair) -> bytes:
+    response = sf.readline().strip()
+    print(f"< {response}")
+    return response
+
+
+if __name__ == "__main__":
+    exit(main())

solutions/3.py

@@ -60,7 +60,7 @@ def main() -> int:
             s.close()
             return 1
 
-    s.close()
+    sf.close()
     return 0
 
 def send(sf: TextIOWrapper, msg: str) -> int: