iceCreamParlor.cpp

#include <bits/stdc++.h>

using namespace std;

string ltrim(const string &);
string rtrim(const string &);
vector<string> split(const string &);

/*
 * Complete the 'icecreamParlor' function below.
 *
 * The function is expected to return an INTEGER_ARRAY.
 * The function accepts following parameters:
 *  1. INTEGER m
 *  2. INTEGER_ARRAY arr
 */

vector<int> icecreamParlor(int m, vector<int> arr) {

    vector<int> ans;
    int k = 0;

    for (auto i = arr.begin(); i != arr.end(); ++i){
        
        for (auto j = 1; j < arr.size()-k; j++){
            int flavor1 = *i;
            int flavor2 = *(i + j);
            int tcost = flavor1 + flavor2;
            if(tcost == m){
                ans.push_back(k+1);
                ans.push_back((j+k));
            }
            // std::cout << flavor2 << "with j "<< j << std::endl;

        }
        k++;
    }

    // for (auto i = ans.begin(); i != ans.end(); ++i){
    //     std::cout << *i << std::endl;
    // }
    return ans;
}

int main()
{
    ofstream fout(getenv("OUTPUT_PATH"));

    string t_temp;
    getline(cin, t_temp);

    int t = stoi(ltrim(rtrim(t_temp)));

    for (int t_itr = 0; t_itr < t; t_itr++) {
        string m_temp;
        getline(cin, m_temp);

        int m = stoi(ltrim(rtrim(m_temp)));

        string n_temp;
        getline(cin, n_temp);

        int n = stoi(ltrim(rtrim(n_temp)));

        string arr_temp_temp;
        getline(cin, arr_temp_temp);

        vector<string> arr_temp = split(rtrim(arr_temp_temp));

        vector<int> arr(n);

        for (int i = 0; i < n; i++) {
            int arr_item = stoi(arr_temp[i]);

            arr[i] = arr_item;
        }

        vector<int> result = icecreamParlor(m, arr);

        for (size_t i = 0; i < result.size(); i++) {
            cout << result[i];

            if (i != result.size() - 1) {
                cout << " ";
            }
        }

        fout << "\n";
    }

    fout.close();

    return 0;
}

string ltrim(const string &str) {
    string s(str);

    s.erase(
        s.begin(),
        find_if(s.begin(), s.end(), not1(ptr_fun<int, int>(isspace)))
    );

    return s;
}

string rtrim(const string &str) {
    string s(str);

    s.erase(
        find_if(s.rbegin(), s.rend(), not1(ptr_fun<int, int>(isspace))).base(),
        s.end()
    );

    return s;
}

vector<string> split(const string &str) {
    vector<string> tokens;

    string::size_type start = 0;
    string::size_type end = 0;

    while ((end = str.find(" ", start)) != string::npos) {
        tokens.push_back(str.substr(start, end - start));

        start = end + 1;
    }

    tokens.push_back(str.substr(start));

    return tokens;
}