hashset
/*
* Template for using hash set to find duplicates.
*/
boolean findDuplicates(List<Type> keys) {
// Replace Type with actual type of your key
Set<Type> hashset = new HashSet<>();
for (Type key : keys) {
if (hashset.contains(key)) {
return true;
}
hashset.add(key);
}
return false;
}hashset implementation
class MyHashSet {
private:
vector<bool> table;
public:
MyHashSet() : table(1e6 + 1, false) {}
void add(int key) {
table[key] = true;
}
void remove(int key) {
table[key] = false;
}
bool contains(int key) {
return table[key];
}
};Copyright © 2021 Codeinu
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