[ad_1]
you can use vector
#include <vector> ...
int n;
cin >> n;
vector<int> vec(n);
...
int size_of_vector = vec.size();
...
[ad_2]
solved char array length c++
[ad_1]
you can use vector
#include <vector> ...
int n;
cin >> n;
vector<int> vec(n);
...
int size_of_vector = vec.size();
...
[ad_2]
solved char array length c++