https://www.hackerrank.com/contests/university-codesprint-2/challenges/separate-the-numbers

main.cc

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>

using namespace std;

inline bool match(const string& s, string pattern) {
    int i = 0;
    while (i + pattern.size() - 1 < s.size()) {
        if (s[i] == '0' || s.substr(i, pattern.size()) != pattern) {
            return false;
        }
        
        i += pattern.size();
        reverse(begin(pattern), end(pattern));
        int carry = 1;
        for (int j = 0; j < pattern.size(); ++j) {
            if (pattern[j] + carry > '9') {
                pattern[j] = '0';
            } else {
                pattern[j]++;
                carry = 0;
                break;
            }
        }
        
        if (carry != 0) {
            pattern += '1';
        }
        reverse(begin(pattern), end(pattern));
    }
    return i == s.size();
}

inline string solve(const string& s) {
    for (int i = 1; i <= s.size()/2; ++i) {
        if (match(s, s.substr(0, i))) {
            return "YES " + s.substr(0, i);
        }
    }
    return "NO";
}

int main() {
    ios_base::sync_with_stdio(0);
    int q;
    cin >> q;
    while (q --> 0) {
        string s;
        cin >> s;
        cout << solve(s) << endl;
    }
    return 0;
}