Problem in solving a problem

#1

My code


The problem

#2

hello @Somasree

the question is asking u to print only unique triplets.
image

but ur solution will print duplicates as well.

#3

Can you please correct my solution

#4

i dont know java (i m ta for c++).
try this ->use set to store ur results

#5

ok.
So i have written the same thing in C++.please now correct it and tell me where I am going wrong

#6

check now->

class Solution {
public:
    vector<vector<int>> threeSum(vector<int>& nums) {
         sort(nums.begin(),nums.end());
        set<vector<int> > st;
         for (int i = 0; i < nums.size(); i++) {
            for (int j = i + 1; j < nums.size(); j++) {
                for (int k = j + 1; k < nums.size(); k++) {
                    if (nums[i] + nums[j] + nums[k] == 0) {
                       
                        st.insert({nums[i],nums[j],nums[k]});
                    }
                }
            }
        }
        vector<vector<int> > result;
        for(auto k : st)
            result.push_back(k);
        return result;
    }
};

used set to avoid duplicate entries.

but this will give tle.

try using two pointers approach.

#7

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