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Educational Codeforces Round 61 (Rated for Div. 2) C. Painting the Fence //前綴和,區間容斥
時間 2020-12-29
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https://codeforces.com/contest/1132/problem/C CF上好題怎麼那麼多!!(大一就該入坑) 題意,少選兩端區間,求最大的區間長度和。 先把所有區間疊加出來的求出來,維護前綴和 (0,1,2次覆蓋的塊數),枚舉不選的兩個畫師對結果的影響。 要想到,0次覆蓋的部分,和1次覆蓋的部分,和2次覆蓋的部分,是互斥的事件()。 #include<bits/stdc++
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Educational Codeforces Round 61 (Rated for Div. 2)(題解)
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