Remove duplicates in array | EASY | GFG POTD | 26-10-24 | GFG Problem of the day | GeeksforGeeks |

[@codewithuday]

// 1 Approach
class Solution {
public:
vector removeDuplicate(vector& arr) {
// code here
// Freq stored
vector freq(101,0);
vector ans;
for(int i=0;i

[@codewithuday]

// 2nd Approach
class Solution {
public:
vector removeDuplicate(vector& arr) {
// code here
unordered_map map;
vector ans;
for(int i:arr){
if(map[i] ==0){
ans.push_back(i);
map[i] = 1;
}
}
return ans;
}
};

[@codewithuday]

// 3rd Approach
class Solution {
public:
vector removeDuplicate(vector& arr) {
// code here
unordered_set set;
vector ans;
for(int i:arr){
if(set.find(i) == set.end()){
ans.push_back(i);
}
set.insert(i);
}
return ans;
}
};