【Next Permutation】cpp 题目: Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers. If such arrangement is not possible, it must rearrange it as the lowest possible order (ie, sorted in ascending order). The replacement must be in-place...
next_permutation的返回值如下:如果变换后序列是非减序的则返回0,否则返回1。 所以如果想用do{...}while(next_permutation(...));的方式生成一个集合的全排列,必须先做sort。 即 便做了sort,从上面的例子我们也可以看出,当集合存在重复元素时,循环的次数并不是10!=3628800,302400是什么呢,恰是10!/ (2!*3...
is_permutation (C++11) determines if a sequence is a permutation of another sequence (function template) prev_permutation generates the next smaller lexicographic permutation of a range of elements (function template) ranges::next_permutation
先说了next_permutation的问题,引出排列的另一种表达方式,然后引入了一种不定进制的表示将其转化为十进制数字,从而使的排列数和有序的十进制数一一对应起来。 从这种不定进制的表示方式,描述一种压缩状态的方法。
User-defined predicate function object that defines the comparison criterion to be satisfied by successive elements in the ordering. A binary predicate takes two arguments and returnstruewhen satisfied andfalsewhen not satisfied. Return Value trueif the lexicographically next permutation exists and has re...
The default binary predicate is less than and the elements in the range must be less than comparable to insure that the next permutation is well defined.The complexity is linear with at most (_Last – _First)/2 swaps.ExampleCopy // alg_next_perm.cpp // compile with: /EHsc #include ...
The next_permutation algorithm assumes that the sequence is sorted in ascending order using the compare function. The nonpredicate version uses the compare function to order the permutations. Example 复制 // next_permutationPV.cpp // compile with: /EHsc // Illustrates how to use the predicate ...
The default binary predicate is less than and the elements in the range must be less than comparable to insure that the next permutation is well defined. The complexity is linear with at most (_Last – _First)/2 swaps. Example 复制 // alg_next_perm.cpp // compile with: /EHsc #inclu...
L'attribut binaire par défaut est moins que les éléments dans la plage doivent être moins que comparable pour assurer que la prochaine permutation est bien définie. La complexité est linéaire avec au plus (_Last – _First) /2 d'échange. Exemple Copier // alg_next_perm.cpp // co...
{ // Reordering the elements of type CInt in a deque // using the prev_permutation algorithm CInt c1 = 5, c2 = 1, c3 = 10; bool deq1Result; deque<CInt> deq1, deq2, deq3; deque<CInt>::iterator d1_Iter; deq1.push_back ( c1 ); deq1.push_back ( c2 ); deq1.push_back ...