ARTS Week 04, 2025

1.Algorithm

2944. Minimum Number of Coins for Fruits

class Solution:
    def minimumCoins(self, prices: List[int]) -> int:
        n = len(prices)
        @cache  # Cache decorator to avoid duplicate calculations of dfs results (memoization)
        def dfs(i: int) -> int:
            if i * 2 >= n:
                return prices[i - 1]  # i starts from 1
            return min(dfs(j) for j in range(i + 1, i * 2 + 2)) + prices[i - 1]
        return dfs(1)

2.Review

What is the Resolute Desk?

Resolute Desk is the president’s desk in the Oval Office of the White House. It is made from the “HMS Resolute”, which was transformed in the 19th century. In 1880, Queen Victoria presented it to the then-president.

3.Tip

Reducing Docker Logs Size

Docker containers generate a large amount of logs during operation. If not cleaned regularly, they may occupy a large amount of disk space.

Docker logs are cleared only when the container is deleted and restarted.

Use the following command to view the size of the container logs:

du -sh /var/lib/docker/containers/<container-id>/<container-id>-json.log

Clear container logs：

You can use the truncate command to clear the log file:

truncate -s 0 /var/lib/docker/containers/d2e9228f92b66ac09fa35dcab36abba2eb4a7f46baa1d03b65d71ed8d42de977/d2e9228f92b66ac09fa35dcab36abba2eb4a7f46baa1d03b65d71ed8d42de977-json.log

Delete all container logs：

Note: Please understand the consequences of the following commands before operating

truncate -s 0 /var/lib/docker/containers/*/*-json.log

Set log size limit for containers：

Modify the /etc/docker/daemon.json file and add the following content:

{
  "log-driver": "json-file",
  "log-opts": {"max-size": "10m", "max-file": "3"}
}

4.Share

Linux Interview Questions

Linux interview questions