INSERT INTO 複数VALUES時のON DUPLICATE KEY UPDATEの書き方

CREATE TABLE table_a (
  a INT NOT NULL,
  b INT NOT NULL,
  c INT NOT NULL,
  UNIQUE (a, b)
);

INSERT INTO table_a (a, b, c) VALUES (1, 2, 0),(3, 4, 5) ON DUPLICATE KEY UPDATE c = VALUES(c);