#include <iostream>
#include <vector>
int main() {
// Specify dimensions of the 2D vector
int rows = 3;
int cols = 4;
// Initialize a 2D vector with specified dimensions and default values (0 in this case)
std::vector<std::vector<int>> myVector(rows, std::vector<int>(cols, 0));
// Access and modify elements in the 2D vector
myVector[1][2] = 42;
// Display the contents of the 2D vector
for (int i = 0; i < rows; ++i) {
for (int j = 0; j < cols; ++j) {
std::cout << myVector[i][j] << " ";
}
std::cout << "\n";
}
return 0;
}