Example: Print Unique Rows using Set of Strings in C++

// Print Unique Rows using Set of Strings
#include <iostream>
#include <vector>
#include <string>
#include <set>

using namespace std;

// Function to print unique rows
void printUniqueRows(const vector<vector<int>>& matrix) {
    int R = matrix.size();
    if (R == 0) return; // Handle empty matrix
    int C = matrix[0].size();

    set<string> uniqueRowsSet;

    for (int i = 0; i < R; ++i) {
        string currentRowStr = "";
        for (int j = 0; j < C; ++j) {
            currentRowStr += to_string(matrix[i][j]);
        }

        // Attempt to insert the string representation of the current row
        // If insertion is successful, it means the row is unique
        if (uniqueRowsSet.find(currentRowStr) == uniqueRowsSet.end()) {
            uniqueRowsSet.insert(currentRowStr);
            // Print the unique row
            for (int j = 0; j < C; ++j) {
                cout << matrix[i][j] << " ";
            }
            cout << endl;
        }
    }
}

int main() {
    // Step 1: Define the boolean matrix
    vector<vector<int>> matrix = {
        {0, 1, 0, 0},
        {1, 0, 1, 1},
        {0, 1, 0, 0},
        {1, 1, 0, 0}
    };

    cout << "Unique rows in the matrix:" << endl;
    // Step 2: Call the function to print unique rows
    printUniqueRows(matrix);

    // Another example matrix
    cout << "\nUnique rows for another matrix:" << endl;
    vector<vector<int>> matrix2 = {
        {1, 1},
        {0, 1},
        {1, 1},
        {0, 0}
    };
    printUniqueRows(matrix2);

    return 0;
}