B. Strange List 題目分析 題意：給你一個長度為n的數組和一個數字x，從第一個元素開始，如果改元素q能被x整除，那么將就在數組后面新增x個(q / x)，直到遇到的元素不能被x整除，求最后數組的元素之和 讓我們從樣例開始入手分析：樣例中的第一個情況數組a為[12]，x為2，數組 ...

You have n gifts and you want to give all of them to children. Of course, you don't want to offend a ...

D. 0-1 MST Ujan has a lot of useless stuff in his drawers, a considerable part of which are his mat ...

Young wilderness explorers set off to their first expedition led by senior explorer Russell. Explore ...

題目連接：https://codeforces.com/contest/1323/problem/B 題意：給一個大小為n的a數組，一個大小為m的b數組，c數組是二維數組c[i][j]=a[i]*b[j]，問面積為k的矩形有幾個。 題解：先把k的所有因子存入一個數組里，然后遍歷因子，表示 ...

B. PIN Codes A PIN code is a string that consists of exactly 4 digits. Examples of possible PIN codes: 7013, 0000 and 0990. Please note that the PIN ...

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　B. Rebranding The name of one small but proud corporation consists of n lowercase ...

C. Everyone is a Winner! On the well-known testing system MathForces, a draw of n rating units is a ...