spiral matrix

#include <iostream>
#include <vector>
using namespace std;

vector<vector<int>> generateMatrix(int n) {
    vector<vector<int>> matrix(n, vector<int>(n, 0));
    int top = 0, bottom = n - 1, left = 0, right = n - 1;
    int num = 1;
    while (top <= bottom && left <= right) {
        for (int i = left; i <= right; i++) {
            matrix[top][i] = num++;
        }
        top++;
        for (int i = top; i <= bottom; i++) {
            matrix[i][right] = num++;
        }
        right--;
        for (int i = right; i >= left; i--) {
            matrix[bottom][i] = num++;
        }
        bottom--;
        for (int i = bottom; i >= top; i--) {
            matrix[i][left] = num++;
        }
        left++;
    }
    return matrix;
}

int main() {
    int n = 3;
    vector<vector<int>> result = generateMatrix(n);
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            cout << result[i][j] << " ";
        }
        cout << endl;
    }
    return 0;
}