#include <bits/stdc++.h> // Vector #include <algorithm> // Reverse using namespace std; int main() { vector<int> nums{4,1,2,1,2}; reverse(nums.begin(), nums.end()); return 0; }
//vector<int> A; reverse(A.begin(),A.end());
std::vector<int> v{1,2,3}; std::reverse(std::begin(v), std::end(v));
vector<int> a = {1,2,3,4,5,6}; reverse(a.begin(), a.end());
reverse(start_index, last_index);