[FIXED] The python program runs well in my local environment, but when uploaded to OJ, it was prompted with a runtime error

Issue

My Python program runs without any problems locally, but I receive a runtime error when running it on OJ. All the error messages show exited with code 1. I wonder what could be the problem.

Here is the link to the question (sorry, it doesn't seem to have an English version): https://www.luogu.com.cn/problem/P5730

• 1 <= n <= 100

Here is my code:

digits_str_list = [
    ".XXX...X.XXX.XXX.X.X.XXX.XXX.XXX.XXX.XXX",
    ".X.X...X...X...X.X.X.X...X.....X.X.X.X.X",
    ".X.X...X.XXX.XXX.XXX.XXX.XXX...X.XXX.XXX",
    ".X.X...X.X.....X...X...X.X.X...X.X.X...X",
    ".XXX...X.XXX.XXX...X.XXX.XXX...X.XXX.XXX"
]

ans = [[] for _ in range(5)]
input()  # n
digits = input()
for i in range(5):
    for digit in digits:
        start_idx = eval(digit) * 4 + 1
        ans[i].append(digits_str_list[i][start_idx : start_idx + 3])
    print(".".join(ans[i]))

Apologies for my poor English, as it is not my native language. I hope it doesn't affect your reading, and feel free to point out any mistakes in my English.

• using a variable to capture the return value of input(), still RE.
• encapsulating it in a function and calling it using if __name__ == '__main__':, still RE.
• Replace eval(digit) with int(digit).

Solution

The issue has been resolved.

It turns out that there was a problem with the test cases on Luogu OJ. The input contained not only numeric characters but also whitespace characters. I'm really frustrated!

Here is the accepted code.

digits_str_list = [
    ".XXX...X.XXX.XXX.X.X.XXX.XXX.XXX.XXX.XXX",
    ".X.X...X...X...X.X.X.X...X.....X.X.X.X.X",
    ".X.X...X.XXX.XXX.XXX.XXX.XXX...X.XXX.XXX",
    ".X.X...X.X.....X...X...X.X.X...X.X.X...X",
    ".XXX...X.XXX.XXX...X.XXX.XXX...X.XXX.XXX",
]

ans = [[] for _ in range(5)]
n = input()
digits = input().strip()
for i in range(5):
    for digit in digits:
        start_idx = int(digit) * 4 + 1
        ans[i].append(digits_str_list[i][start_idx : start_idx + 3])
    print(".".join(ans[i]))

Answered By - keikei