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| class MyHashSet {
private:
vector<list<int>> data;
static const int base = 769;
static int hash(int key) {
return key % base;
}
public:
MyHashSet(): data(base) {
}
void add(int key) {
int h = hash(key);
for (auto it = data[h].begin(); it != data[h].end(); ++it)
if ((*it) == key)
return;
data[h].push_back(key);
}
void remove(int key) {
int h = hash(key);
for (auto it = data[h].begin(); it != data[h].end(); ++it)
if ((*it) == key) {
data[h].erase(it);
return;
}
}
bool contains(int key) {
int h = hash(key);
for (auto it = data[h].begin(); it != data[h].end(); ++it)
if ((*it) == key)
return true;
return false;
}
};
|