#include <iostream>
#include <vector>
int main() {
// Step 1: Declare a 2D vector
std::vector<std::vector<int>> twoDVector;
// Step 2: Input the number of rows and columns
int numRows, numCols;
std::cout << "Enter the number of rows: ";
std::cin >> numRows;
std::cout << "Enter the number of columns: ";
std::cin >> numCols;
// Step 3: Resize the 2D vector based on user input
twoDVector.resize(numRows, std::vector<int>(numCols));
// Step 4: Input elements into the 2D vector
std::cout << "Enter elements row-wise:\n";
for (int i = 0; i < numRows; ++i) {
for (int j = 0; j < numCols; ++j) {
std::cout << "Enter element at position (" << i << ", " << j << "): ";
std::cin >> twoDVector[i][j];
}
}
// Step 5: Display the 2D vector
std::cout << "Entered 2D vector:\n";
for (int i = 0; i < numRows; ++i) {
for (int j = 0; j < numCols; ++j) {
std::cout << twoDVector[i][j] << " ";
}
std::cout << "\n";
}
return 0;
}