Transpose Matrix
Given a 2D integer array matrix, return the transpose of matrix.
The transpose of a matrix is the matrix flipped over its main diagonal, switching the matrix's row and column indices.
Example 1:
Input: matrix = [[1,2,3],[4,5,6],[7,8,9]]
Output: [[1,4,7],[2,5,8],[3,6,9]]
Example 2:

Input: matrix = [[1,2,3],[4,5,6]]
Output: [[1,4],[2,5],[3,6]]
class Solution {
public:
vector<vector<int>> transpose(vector<vector<int>>& matrix) {
vector<vector<int>> ans;
for(int i=0;i<matrix[0].size();i++)
{
vector<int>temp;
for(int j=0;j<matrix.size();j++)
{
temp.push_back(matrix[j][i]);
}
ans.push_back(temp);
}
return ans;
}
};

// TC O(N*M)
// SC O(N*M)

Amazon SDE1 (T1 interview question asked)

Raman Former (Python 3)✅

𝐅𝐞𝐞𝐥𝐢𝐧𝐠 𝐰𝐡𝐞𝐧 𝐲𝐨𝐮 𝐜𝐨𝐦𝐩𝐥𝐞𝐭𝐞𝐝 𝐚𝐥𝐥 𝐭𝐡𝐞 𝐭𝐚𝐬𝐤𝐬 𝐚𝐧𝐝 𝐦𝐚𝐫𝐤 𝐭𝐡𝐞𝐦 ✅, 𝐢𝐭'𝐬 𝐮𝐧𝐦𝐚𝐭𝐜𝐡𝐞𝐝 😊❤️
P.S. Start creating a list of task which you want to do on any particular day, trust me it will increase your productivity and help you being consistent ✅

// First Unique Character
// TC O(N)
// SP O(N)
int Xexamster(string str)
{
int count = 0;
unordered_map<char, int> mp;
for (int i = 0; i < str.length(); i++)
mp[str[i]]++;
for (auto i : mp)
{
if (i.second == 1)
count++;
}
return count;
}

EV_First Unique Character
Python 3✅

Minimize Array Cost
Python 3 ✅

EV_Minimize Array Cost ✅
(Python 3)

Flipkart GRID 4.0 (The most awaited opportunity)

Batch eligible: 2023, 2024, 2025 and 2026 passouts

Great opportunity to start career with Flipkart ❤️✅


https://bit.ly/3GMY5ZM


Share Among juniors, friends and seniors and also hit a ❤️ so that it will reach to max😊✅

String Letter Search
Python 3✅

GeeksForGeeks is hiring Technical Content Engineer Intern.

If you are looking for same in any of the below roles, send your resume at divyanshu.kumar@geeksforgeeks.org

All batch Eligible.

#use 1st line for permutations
from itertools import permutations

li=[]
ans =[]
re = []
li = list(permutations(input))
for i in li:
s =0
for j in range(len(i)):
op = 2**j
s += i[j]//op
ans.append(s)
for i in input3:
a =0
for j in ans:
if i<=j:
a+= 1
re.append(a)
return(re)

Farmer jhons dilemma ✅
(Python 3)

The Mathematical Expression
IBM