C++ - How can I find vector<int> in vector<vector<int>> with STL algorithm function?

Question

I have a vector of vector of int that contains some data, say

[ [1,2,3],  [7,9] ]

And there is a vector, say a . I want to find out if vector a is in that vector of vector. How can I do that?

Answer 1

std::find(std::begin(to_search), std::end(to_search), to_find);

返回迭代器到to_find中to_search的位置；如果不包含，则to_search::end() 。