看看编译信息,如果是UnexpectedResponse: got an unexpected response when requesting `https://codeforces.com/data/submitSource`: error decoding response body: unknown case status: Idleness limit exceeded就说明你没清空缓冲区。(原文说的很清楚,不清空缓冲区是ILE,翻译把Idleness Limit Exceeded弄成了TLE)
如果是其他的,那就再交一次,当然也可以去CF上直接交。UKE让洛谷臭名昭著。