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| 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 | 99e2e923d0c77b02f3fb4ff648ea916954868606 (patch) | |
| tree | ec8e03f6f2cd1ce43990fb4fe6cd631967d0237e /store/works/solutions/leetcode/cpp/60.cpp | |
| parent | 1cee979f5d36b311a03cc7397a036ba11caf3d42 (diff) | |
| download | crupest-99e2e923d0c77b02f3fb4ff648ea916954868606.tar.gz crupest-99e2e923d0c77b02f3fb4ff648ea916954868606.tar.bz2 crupest-99e2e923d0c77b02f3fb4ff648ea916954868606.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 |