D. Umka and a Long Flight | Codeforces Round 863 (Div. 3) | Codeforces Solution

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D. Umka and a Long Flight | Codeforces Round 863 (Div. 3) | Codeforces Solution

D. Umka and a Long Flight | Codeforces Round 863 (Div. 3) | Codeforces Solution