WIL's blog

By WIL, 10 years ago, In English

Recently i saw the following fragment of code in some solutions here in codeforce and another online judges, and my question is. What is this code?

    #ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
    #endif

thank in advance!

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10 years ago, # |
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Maybe this can help.