dpi

题目大意： 分析： 发现最后的答案就是 b 1 ∗ a 2 + b 2 ∗ a 3 + … … + b n − 1 ∗ a n b_1*a_2+b_2*a_3+……+b_{n-1}*a_n b 1 ​ ∗ a 2 ​ + b 2 ​ ∗ a 3 ​ + … … + b n − 1 ​ ∗ a n ​ 然后对于其中的一些连续的项需要乘上 k k k 或者 k 2 k^2 k 2 如果 a i ∗ k a_i*k a i ​ ∗ k ，那么 b i b_i b i ​ 也要 ∗ k *k ∗ k 第 i i i 项是 b i ∗ a i + 1 b_i*a_{i+1} b i ​ ∗ a i + 1 ​ ， 设 d p i , 0 , 0 dp_{i,0,0} d p i , 0 , 0 ​ 表示前i项中，当前项中 b i , a i + 1 b_i,a_{i+1} b i ​ , a i + 1 ​ 都没有进行 ∗ k *k ∗ k 操作，前面也没有进行 ∗ k *k ∗ k 操作时的最小合并代价 设 d p i , 0 , 1 dp_{i,0,1} d p i , 0 , 1 ​ 表示前i项中，当前项中 b i , a i + 1 b_i,a_{i+1} b i ​ , a i + 1 ​ 都没有进行 ∗ k *k ∗ k 操作，前面进行了 ∗ k *k ∗ k

I just want to know if the pixel unit is something that doesn't change, and if we can convert from pixels to let's say centimeters ? Mark Ransom Similar to this question which asks about points instead of centimeters. There are 72 points per inch and there are 2.54 centimeters per inch, so just substitute 2.54 for 72 in the answer to that question. I'll quote and correct my answer here: There are 2.54 centimeters per inch; if it is sufficient to assume 96 pixels per inch, the formula is rather simple: centimeters = pixels * 2.54 / 96 There is a way to get the configured pixels per inch of your