OrganizingContainersOfBalls.c

#include <bits/stdc++.h>

using namespace std;

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

/*
 * Complete the 'organizingContainers' function below.
 *
 * The function is expected to return a STRING.
 * The function accepts 2D_INTEGER_ARRAY container as parameter.
 */

string organizingContainers(vector<vector<int>> container) {
    int n = container.size();
    vector<long long> rowSum(n, 0), colSum(n, 0);

    // Calculate row sums and column sums
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            rowSum[i] += container[i][j];
            colSum[j] += container[i][j];
        }
    }

    // Sort both sums
    sort(rowSum.begin(), rowSum.end());
    sort(colSum.begin(), colSum.end());

    // Compare if they are equal
    if (rowSum == colSum) {
        return "Possible";
    } else {
        return "Impossible";
    }
}

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

    string q_temp;
    getline(cin, q_temp);

    int q = stoi(ltrim(rtrim(q_temp)));

    for (int q_itr = 0; q_itr < q; q_itr++) {
        string n_temp;
        getline(cin, n_temp);

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

        vector<vector<int>> container(n);

        for (int i = 0; i < n; i++) {
            container[i].resize(n);

            string container_row_temp_temp;
            getline(cin, container_row_temp_temp);

            vector<string> container_row_temp = split(rtrim(container_row_temp_temp));

            for (int j = 0; j < n; j++) {
                int container_row_item = stoi(container_row_temp[j]);

                container[i][j] = container_row_item;
            }
        }

        string result = organizingContainers(container);

        fout << result << "\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;
}