用STL中的vector动态开辟二维数组 源代码:#include <iostream>#include <vector>using namespace std;int main(){ int m, //行数 n; //列数 cout << "input value for m,n:"; cin>>m>>n; //注意下面这一行:vector<int后两个">"之间要有空格!否则会被认…
[抄题]: Implement an iterator to flatten a 2d vector. Example: Input: 2d vector = [ [1,2], [3], [4,5,6] ] Output: [1,2,3,4,5,6] Explanation: By calling next repeatedly until hasNext returns false, the order of elements returned by next should be: [1,…