【基础算法】next_permutation的手动实现

420. 火星人

#include <iostream> #include <algorithm> #include <cstring>  using namespace std;  const int N = 1e4 + 10;  int n, m; int w[N];  int main() {     scanf(%d%d, &n, &m);     for(int i = 1; i <= n; i ++ ) scanf(%d, &w[i]);     while(m -- )     {         int k = n;         while(w[k - 1] > w[k]) k -- ;          int t = k;         while(w[t + 1] > w[k - 1]) t ++ ;         swap(w[k - 1], w[t]);         reverse(w + k, w + n + 1);     }     for(int i = 1; i <= n; i ++ ) printf(%d , w[i]);     return 0; }  作者:Once. 链接:https://www.acwing.com/activity/content/code/content/3396797/ 来源:AcWing 著作权归作者所有。商业转载请联系作者获得授权,非商业转载请注明出处。 

next_permutation写法

#include <iostream> #include <algorithm> #include <cstring>  using namespace std;  const int N = 1e4 + 10;  int n, m; int w[N];  int main() {     scanf(%d%d, &n, &m);     for(int i = 1; i <= n; i ++ ) scanf(%d, &w[i]);     while(m -- )     {         next_permutation(w + 1, w + n + 1);     }     for(int i = 1; i <= n; i ++ ) printf(%d , w[i]);     return 0; }  作者:Once. 链接:https://www.acwing.com/activity/content/code/content/3396797/ 来源:AcWing 著作权归作者所有。商业转载请联系作者获得授权,非商业转载请注明出处。