# Why correct in Custom TestCase, but runtime error when I submit? It is an easy case [[1,2,3],[4,5,6],[7,8,9]]

• Why correct in Custom TestCase, but runtime error when I submit? It is an easy case
[
[1,2,3],
[4,5,6],
[7,8,9]
]

``````class Solution {
public:
vector<int> spiralOrder(vector<vector<int>>& matrix) {
if (matrix.size() == 0 || matrix[0].size() == 0) return vector<int>();

int m = matrix.size();
int n = matrix[0].size();
vector<int> order(m * n);
int ind = 0;
int r1, r2, c1, c2;
for (int i = 0; i <= min(m, n) / 2; i++) {
r1 = i;
r2 = m - 1 - i;
c1 = i;
c2 = n - 1 - i;
// cout << "1st row" << endl;
if (c2 >= c1) {
for (int j = c1; j <= c2; j++) {
order[ind++] = matrix[r1][j];
}
}
// for (auto x: order) {cout << x << " "; } cout << endl;

// cout << "1st col" << endl;
if (r2 > r1) {
for (int j = r1+1; j <= r2; j++) {
order[ind++] = matrix[j][c2];
}
}
// for (auto x: order) {cout << x << " "; } cout << endl;

// cout << "2nd row" << endl;
if (r2 > r1 && c2 > c1) {
for (int j = c2-1; j >= c1; j--) {
order[ind++] = matrix[r2][j];
}
}
// for (auto x: order) {cout << x << " "; } cout << endl;

// cout << "2nd col" << endl;
if (r2 > r1 + 1 && c2 > c1) {
for (int j = r2-1; j >= r1+1; j--) {
order[ind++] = matrix[j][c1];
}
}
// for (auto x: order) {cout << x << " "; } cout << endl;

// cout << endl;
}
return order;
}

};
``````

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