// code challenge

Count ERROR lines

~12 min

Scan a log stream and report how many lines contain ERROR.

You're on call and someone asks "how bad is it?" Quantify it.

Input: the first line is an integer **N**; the next N lines are log lines. Output: print the number of lines that contain the substring `ERROR`.

Example input: ``` 4 10:00 INFO boot 10:01 ERROR db timeout 10:02 WARN slow query 10:03 ERROR db timeout ``` Expected output: ``` 2 ```

Hint: read N with `int(input())`, loop `range(n)`, use `"ERROR" in line`.

Language: python · Judge0

// sample tests

stdin "4\n10:00 INFO boot\n10:01 ERROR db timeout\n10:02 WARN slow query\n10:03 ERROR db timeout" → stdout "2"
stdin "2\nINFO ok\nWARN meh" → stdout "0"

n = int(input())
count = 0
for _ in range(n):
    line = input()
    # count lines containing ERROR
print(count)