auto update README.md

README.md

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 |5557. 1학년|[링크](./%EB%B0%B1%EC%A4%80/Gold/5557.%E2%80%851%ED%95%99%EB%85%84/README.md)|
 |7569. 토마토|[링크](./%EB%B0%B1%EC%A4%80/Gold/7569.%E2%80%85%ED%86%A0%EB%A7%88%ED%86%A0/README.md)|
 |7576. 토마토|[링크](./%EB%B0%B1%EC%A4%80/Gold/7576.%E2%80%85%ED%86%A0%EB%A7%88%ED%86%A0/README.md)|
+|8980. 택배|[링크](./%EB%B0%B1%EC%A4%80/Gold/8980.%E2%80%85%ED%83%9D%EB%B0%B0/README.md)|
 |9251. LCS|[링크](./%EB%B0%B1%EC%A4%80/Gold/9251.%E2%80%85LCS/README.md)|
 |9466. 텀 프로젝트|[링크](./%EB%B0%B1%EC%A4%80/Gold/9466.%E2%80%85%ED%85%80%E2%80%85%ED%94%84%EB%A1%9C%EC%A0%9D%ED%8A%B8/README.md)|
 |9663. N－Queen|[링크](./%EB%B0%B1%EC%A4%80/Gold/9663.%E2%80%85N%EF%BC%8DQueen/README.md)|