vector <int> v;

int row = matrix.size();

if (row<=0) return v;

int col = matrix[0].size();

if (col<=0) return v;

int r, c;

for (r=0, c=0; r<(row+1)/2 && c<(col+1)/2; r++, c++){

//top

for(int i=c; i<col-c; i++){

v.push_back(matrix[r][i]);

}

//right

for(int i=r+1; i<row-r; i++){

v.push_back(matrix[i][col-c-1]);

}

//bottom

for(int i=col-c-2; row-r-1>r && i>=c; i--){

v.push_back(matrix[row-r-1][i]);

}

//left

for(int i=row-r-2; col-c-1>c && i>r; i--){

v.push_back(matrix[i][c]);

}

}

return v;

{

cout << "[";

for(int j=0; j<v.size(); j++) {

printf(" %02d", v[j]);

}

cout << "]" << endl;;

{

for(int i=0; i<vv.size(); i++) {

printArray(vv[i]);

}

cout << endl;

{

vector< vector<int> > vv;

int cnt = 1;

for(int i=0; i<n; i++){

vector<int> v;

for(int j=0; j<m; j++){

v.push_back(cnt++);

}

vv.push_back(v);

}

return vv;

{

int n=3, m=3;

if (argc>2){

n = atoi(argv[1]);

m = atoi(argv[2]);

}

vector< vector<int> > matrix = createMatrix(n, m);

printMatrix(matrix);

vector<int> v = spiralOrder(matrix);

printArray(v);

return 0;