C++ Code for the River finding

river.cpp

#include <algorithm>
#include <iostream>
#include <string>
#include <vector>

using namespace std;

int main() {
    int number_of_words;
    cout << "Enter the number of words: ";
    cin >> number_of_words;

    vector<int> vector_instance;

    if (number_of_words <= 0) {
        cout << "Invalid number of worlds";
        return 0;
    }

    int max_string_length = 0;

    for (int i = 0; i < number_of_words; i++) {
        cout << "Enter the word ";
        string basic_string;
        cin >> basic_string;
        vector_instance.push_back(static_cast<int &&>(basic_string.size()));
        max_string_length = max(max_string_length, vector_instance.back());
    }

    int ret = 0, retw = -1;
    for (auto string_length = static_cast<unsigned long>(max_string_length);; string_length++) {
        vector<int> current_item(string_length), next_item(string_length);
        int cs = -1, new_line = 1;
        for (int current_item_of_vector : vector_instance) {
            if (cs + current_item_of_vector >= string_length) {
                current_item.swap(next_item);
                next_item = vector<int>(string_length);
                cs = -1;
                new_line++;
            }
            if (cs >= 0) {
                next_item[cs] = max(current_item[cs - 1] + 1, max(current_item[cs] + 1, current_item[cs + 1] + 1));
                if (next_item[cs] > ret) {
                    ret = next_item[cs];
                    retw = static_cast<int>(string_length);
                }
            }
            cs += current_item_of_vector + 1;
        }

        if (ret >= new_line) {
            break;
        }
    }

    cout << "Rever width " << retw << " Revier " << ret << endl;
}