1// Create a vector containing n
2//vectors of size m, all u=initialized with 0
3vector<vector<int> > vec( n , vector<int> (m, 0));
1// Initializing 2D vector "vect" with
2// values
3vector<vector<int> > vect{ { 1, 2, 3 },
4 { 4, 5, 6 },
5 { 7, 8, 9 } };