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Usually, topological sort is implemented like
void dfs(int x) {
vis[x] = true;
for(int u = 0; u < n; u++) {
if(!vis[u] && graph[x][u] == 1) {
dfs(u);
}
}
order.push_back(x);
}
And then printed in reverse order But if I implement this way
void dfs(int x) {
order.push_back(x);
vis[x] = true;
for(int u = 0; u < n; u++) {
if(!vis[u] && graph[x][u] == 1) {
dfs(u);
}
}
}
And print in same order.
Can someone provide me a test case where 2nd approach will fail
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