Two Dimensional

#include <iostream>
#include <string>
#include <sstream>
#include <vector>

std::vector <std::vector<char>> get2DMatrix() {
    std::vector <std::vector<char>> output;
    std::string lineInput;
    getline(std::cin, lineInput);

    std::stringstream str(lineInput);
    int token;
    std::vector<int> size2D;
    while (str >> token) {
        size2D.push_back(token);
    }
    for (int i = 0; i < size2D[0]; i++) {
        getline(std::cin, lineInput);
        str.clear();
        str.str(lineInput);
        char c;

        std::vector<char> intLine;
        while (str >> c) {
            intLine.push_back(c);
        }
        output.push_back(intLine);
    }
    return output;
}



void printMatrix(std::vector <std::vector<char>>& matrix) {
    int xLength = matrix.size();
    int yLength = matrix[0].size();
    for (size_t i = 0; i < xLength; i++)
    {
        for (size_t j = 0; j < yLength; j++)
        {
            std::cout << matrix[i][j] << ' ';
        }
        std::cout << "\n";

    }
}

void paintChar(char c, int y, int x, std::vector <std::vector<char>>& matrix) {
    int xLength = matrix[0].size();
    int yLength = matrix.size();
    char change = matrix[x][y];
    for (int i = x; i < xLength; i++) {
        for (int j = y; j < yLength; j++) {
            if (change == matrix[j][i]) matrix[j][i] = c;
            else break;
        }
        for (int j = y-1; j >= 0; j--) {
            if (change == matrix[j][i] || c == matrix[j][i]) matrix[j][i] = c;
            else break;
        }
    }

    for (int i = x-1; i >=0; i--) {
        for (int j = y; j < yLength; j++) {
            if (change == matrix[j][i]) matrix[j][i] = c;
            else break;
        }
        for (int j = y - 1; j >= 0; j--) {
            if (change == matrix[j][i] ||c == matrix[j][i] ) matrix[j][i] = c;
            else break;
        }
    }
}

int main()
{
    auto matrix = get2DMatrix();

    char c;
    int x, y;
    std::cin >> c >> x >> y;

    paintChar(c, y, x, matrix);

    printMatrix(matrix);

    return 0;
}