B. Find The Bone time limit per test 2 seconds memory ...
C. Bank Hacking time limit per test seconds memory limit per test megabytes input standard input output standard output Although Inzane successfully found his beloved bone, Zane, his owner, has yet t ...
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B. Find The Bone time limit per test 2 seconds memory ...
C. Watto and Mechanism time limit per test 3 seconds memory limit per test 256 megabytes input ...
題意:給你三個杯子,一開始鑰匙放在中間的杯子里,然后每一回合等概率將左右兩個杯子中的一個與中間杯子交換。求n回合之后鑰匙在中間杯子的概率。這里要求概率以分數形式輸出,先化成最簡,然后對1e9 + 7取 ...
C - The Football Season 先考慮求解 \[x\times w + y\times d=p \] 若存在一組解 \[\begin{cases} x_0\\ y_0 = kw + v & (0<v<w)\\ \end{cases ...
原題鏈接 這是一道有(du)趣(liu)的數據結構題 首先發現無修改詢問,所以珂以莫隊。然后發現你要維護當前的圖是否為二分圖,這顯然珂以大力LCT維護最大生成樹。然后復雜度就變成了驚人的\(O(N ...
Description An array of integers p1,p2,…,pnp1,p2,…,pn is called a permutation if it contains each ...
題目鏈接 題意:給定n個點,給出一些邊權為0/1的邊,構造完全圖,滿足對於任何一個三元環,三條邊權和為奇。求符合條件的完全圖數量,對\(1e9+7\)取模。 分析:其實原題給定的邊權是love/h ...
CF1458C Latin Square 題目來源:Codeforces, Codeforces Round #691 (Div. 1), CF#691, CF1458C Latin Square 題目鏈接 本題題解 發現 \(\texttt{RLDU}\) 和 \(\texttt{IC ...