diff options
| author | Yuqian Yang <crupest@crupest.life> | 2025-02-28 23:13:39 +0800 |
|---|---|---|
| committer | Yuqian Yang <crupest@crupest.life> | 2025-02-28 23:13:39 +0800 |
| commit | dc1f0c4c0096013799416664894c5194dc7e1f52 (patch) | |
| tree | 2f5d235f778cd720f4c39ec3e56b77ba6d99f375 /store/works/solutions/leetcode/cpp/60.cpp | |
| parent | 7299d424d90b1effb6db69e3476ddd5af72eeba4 (diff) | |
| download | crupest-dc1f0c4c0096013799416664894c5194dc7e1f52.tar.gz crupest-dc1f0c4c0096013799416664894c5194dc7e1f52.tar.bz2 crupest-dc1f0c4c0096013799416664894c5194dc7e1f52.zip | |
chore(store): move everything to store.
Diffstat (limited to 'store/works/solutions/leetcode/cpp/60.cpp')
| -rw-r--r-- | store/works/solutions/leetcode/cpp/60.cpp | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/store/works/solutions/leetcode/cpp/60.cpp b/store/works/solutions/leetcode/cpp/60.cpp new file mode 100644 index 0000000..f090355 --- /dev/null +++ b/store/works/solutions/leetcode/cpp/60.cpp @@ -0,0 +1,44 @@ +#include <string>
+#include <vector>
+
+using std::string;
+
+class Solution
+{
+public:
+ string getPermutation(int n, int k)
+ {
+ k--;
+
+ string result;
+ result.reserve(n);
+
+ std::vector<char> nums;
+ nums.reserve(n);
+
+ for (int i = 1; i <= n; i++)
+ {
+ nums.push_back(i + '0');
+ }
+
+ n--;
+ int fac = 1;
+ for (int i = 2; i <= n; i++)
+ {
+ fac *= i;
+ }
+
+ while (n > 0)
+ {
+ const int index = k / fac;
+ k = k % fac;
+ result += nums[index];
+ nums.erase(nums.cbegin() + index);
+ fac /= n--;
+ }
+
+ result += nums.front();
+
+ return result;
+ }
+};
\ No newline at end of file |