strictly_larger.cpp

#include <vector>
#include <cctype>

std::vector<std::string> tokenize(const std::string& str, const char delimiter);
bool is_number(const std::string& str);

class Solution {
public:
    bool areNumbersAscending(string s) {
        std::vector<std::string> tokens{tokenize(s, ' ')};
        
        bool is_larger{};
        for (std::size_t i{}, n{tokens.size()}; i < n; ++i)
        {
            if ((i + 1) < n)
            {
                if (is_number(tokens[i]) && is_number(tokens[i + 1]))
                {
                    if (tokens[i + 1] > tokens[i])
                    {
                        is_larger = true;
                    }
                    else if (tokens[i + 1] <= tokens[i])
                    {
                        is_larger = false;
                        break;
                    }
                }
            }
        }
        return is_larger;
    }
};

std::vector<std::string> tokenize(const std::string& str, const char delimiter)
{
    std::vector<std::string> tokens;
    std::string substr;
    for (std::size_t i{}, n{str.length()}; i < n; ++i)
    {
        if (i != n - 1)
        {
            if (str[i] != delimiter)
            {
                substr += str[i];
            }
            else
            {
                if (!substr.empty())
                {
                    tokens.push_back(substr);
                    substr = "";
                }
            }
        }
        else if (str[i] == str[n - 1])
        {
            if (str[i] != delimiter)
            {
                substr += str[i];
            }
            
            if (!substr.empty())
            {
                tokens.push_back(substr);
            }
        }
    }
    return tokens;
}

bool is_number(const std::string& str)
{
    bool flag{};
    if (str.length() == 1)
    {
        return std::isdigit(str[0]);
    }
    else if (str.length() > 1)
    {
        for (const char ch : str)
        {
            if (std::isdigit(ch))
            {
                flag = true;
            }
            else
            {
                flag = false;
            }
        }
    }
    return flag;
}