Bump

I notice that there are only around a 100 topics in this playlist. Is this really sufficient in helping me improve from a novice to a red rated coder?

Why do I keep receiving an error?

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
using namespace std;
string rotation(string s, long long n) {
 if ((s.length()) < n) {
 string temp = s;
 for (long long i = (s.length() - 1); i > 0; i--) {

Comments on my solution?

#include <bits/stdc++.h>

using namespace std;

int main() {

int n; cin >> n;

int arr[n];

for (int i = 0; i < n; i++) {

cin >> arr[i];

}

int current = 0;

pair<int, int> maxCoords;

int currentMax = 0;

Comments on this accepted C++ solution?

#include <bits/stdc++.h>

using namespace std;

int main() {

int n1, n2, n3; cin >> n1 >> n2 >> n3;

int pop = n1 + n2 + n3;

int ids[pop];

vector<int> reIds;

for (int i = 0; i < pop; i++) {

cin >> ids[i];

}

sort(ids, ids + pop);