// playground

Code challenges

LeetCode-style problems. Judge: Judge0 (hosted).

3 minCheck Even or OddDetermine whether a given integer is even or odd.12 minUsers from /etc/passwdParse the classic colon-delimited file and extract real users.12 minCommit message linterEnforce a team's commit convention with ten lines of Python.12 minCount ERROR linesScan a log stream and report how many lines contain ERROR.10 minExtract the log levelSplit a log line and print its severity field.10 minAdd two numbersWarm-up: read two integers from stdin and print their sum.15 minCount non-empty linesSRE-flavored warm-up: count log lines that are not blank.