codeforces1294E Obtain a Permutation https://codeforces.com/problemset/problem/1294/E 只能选择一列向上shift,那么我们只要一列一列的算出这一列的变化最小值就行了。 通过预处理出每一列中有哪些数字,再通过给出的这一列的数字,我们可以算出开头在某一个位置时,有多少位置上的数字是可以不会变的,就...
More precisely, for given A and P, find the lexicographically smallest message O, for which there exists a permutation π such that for every i. Note that the sequence S is lexicographically smaller than the sequence T, if there is an index i such that Si < Ti and for all j <...
In the above example, Bob may have, for instance, selected a permutation (3, 4, 1, 2) and stored the permuted key P = (6, 3, 16, 7). One year has passed and Alice wants to decrypt her message. Only now Bob has realised that this is impossible. As he has p...
Codeforces 1294E Obtain a Permutation 题目链接: Codeforces 1294E Obtain a Permutation 思路: 对于每一列的数组,我们分开考虑,设当前为第j列(j从1开始); 对于在第i位置的数(i从0开始),它应该为i * m + j,因此如果一个数n是在我们目标序列中的,它的位置应该为(n - j) / m; 遍历我们当前的序列...
codeforces1294E Obtain a Permutation https://codeforces.com/problemset/problem/1294/E 只能选择一列向上shift,那么我们只要一列一列的算出这一列的变化最小值就行了。 通过预处理出每一列中有哪些数字,再通过给出的这一列的数字,我们可以算出开头在某一个位置时,有多少位置上的数字是可以不会变的,就...