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| author | crupest <crupest@outlook.com> | 2020-08-22 21:33:12 +0800 |
|---|---|---|
| committer | crupest <crupest@outlook.com> | 2020-08-22 21:33:12 +0800 |
| commit | 6f360717f3e7699e773c4d025b1aeb685d53b367 (patch) | |
| tree | 7fa8a4e21047c51945ae949f8aa31db8d05a45b8 | |
| parent | 5a8363dea188ccbceda6be3b22b1a694a5339024 (diff) | |
| download | crupest-6f360717f3e7699e773c4d025b1aeb685d53b367.tar.gz crupest-6f360717f3e7699e773c4d025b1aeb685d53b367.tar.bz2 crupest-6f360717f3e7699e773c4d025b1aeb685d53b367.zip | |
import(solutions): Add problem 704 .
| -rw-r--r-- | works/solutions/cpp/704.cpp | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/works/solutions/cpp/704.cpp b/works/solutions/cpp/704.cpp new file mode 100644 index 0000000..b56a01a --- /dev/null +++ b/works/solutions/cpp/704.cpp @@ -0,0 +1,79 @@ +#include <vector>
+#include <memory>
+
+class MyHashSet
+{
+ static const int max = 100;
+
+private:
+ std::unique_ptr<std::vector<int>> data_[max];
+
+public:
+ /** Initialize your data structure here. */
+ MyHashSet()
+ {
+ }
+
+ void add(int key)
+ {
+ const auto index = key % max;
+ auto &ptr = data_[index];
+ if (ptr == nullptr)
+ {
+ ptr.reset(new std::vector<int>());
+ }
+
+ auto &v = *ptr;
+ for (auto d : v)
+ {
+ if (d == key)
+ return;
+ }
+
+ v.push_back(key);
+ }
+
+ void remove(int key)
+ {
+ const auto index = key % max;
+ auto &ptr = data_[index];
+ if (ptr == nullptr)
+ return;
+ auto &v = *ptr;
+ const auto end = v.cend();
+ for (auto iter = v.cbegin(); iter != end; ++iter)
+ {
+ if (*iter == key)
+ {
+ v.erase(iter);
+ return;
+ }
+ }
+ }
+
+ /** Returns true if this set contains the specified element */
+ bool contains(int key)
+ {
+ const auto index = key % max;
+ auto &ptr = data_[index];
+ if (ptr == nullptr)
+ return false;
+
+ const auto &v = *ptr;
+ for (auto d : v)
+ {
+ if (d == key)
+ return true;
+ }
+
+ return false;
+ }
+};
+
+/**
+ * Your MyHashSet object will be instantiated and called as such:
+ * MyHashSet* obj = new MyHashSet();
+ * obj->add(key);
+ * obj->remove(key);
+ * bool param_3 = obj->contains(key);
+ */
|