How to find repeating sequence of characters in a given array?

Question

My problem is to find the repeating sequence of characters in the given array. simply, to identify the pattern in which the characters are appearing.

Answer 1

This is a solution I came up with using the queue, it passed all the test cases of a similar problem in codeforces. Problem No is 745A.

#include
using namespace std;
typedef long long ll;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    string s, s1, s2; cin >> s; queue qu; qu.push(s[0]); bool flag = true; int ind = -1;
    s1 = s.substr(0, s.size() / 2);
    s2 = s.substr(s.size() / 2);
    if(s1 == s2)
    {
        for(int i=0; i qu2 = qu; string str = "";
    while(!qu2.empty())
    {
        cout << qu2.front() << " ";
        str += qu2.front();
        qu2.pop();
    }*/


    while(!qu.empty())
    {
        if(s[++ind] != qu.front()) {flag = false; break;}
        qu.pop();
    }
    flag == true ? cout << cycle : cout << s.size();
    return 0;
}