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Submitted URL: http://codeforces.com/contest/935/problem/A
Effective URL: https://codeforces.com/contest/935/problem/A
Submission: On May 10 via manual from DE — Scanned from DE
Effective URL: https://codeforces.com/contest/935/problem/A
Submission: On May 10 via manual from DE — Scanned from DE
DOM tree The "DOM" is the Document Object Model