library/TopologicalSort.java

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• Last update: 2023-03-25 00:12:54+09:00

Depends on

• library/AbstractGraph.java
• library/FastIO.java

Verified with

• library/TopologicalSort_test.java

Code

package library;

import java.util.*;
import library.FastIO;
import library.AbstractGraph;

final class TopologicalSort {
	// O(E+V)
	public static final <Edge extends AbstractEdge<Edge>> int[] sort(AbstractGraph<? extends AbstractNode<Edge>, Edge> g) { return sort(g.nodes(), g.edges()); }
	public static final <Edge extends AbstractEdge<Edge>> int[] sort(AbstractNode<Edge>[] nodes, AbstractNode<Edge> edges) {
		int numNode = nodes.length;
		int dq[] = new int[numNode];
		int ptr = 0;
		int size = 0;
		int deg[] = new int[numNode];
		Arrays.fill(deg, 0);
		for(Edge e : edges) deg[e.target] ++;
		for(int i = 0; i < numNode; i ++) if(deg[i] == 0) dq[size ++] = i;
		int ans[] = new int[numNode];
		int idx = 0;
		while(ptr != size) {
			int crt = dq[ptr ++];
			ans[idx ++] = crt;
			for(Edge e : nodes[crt]) if(-- deg[e.target] == 0) dq[size ++] = e.target;
		}
		return idx == numNode ? ans : null;
	}
}

Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.11.2/x64/lib/python3.11/site-packages/onlinejudge_verify/documentation/build.py", line 71, in _render_source_code_stat
    bundled_code = language.bundle(stat.path, basedir=basedir, options={'include_paths': [basedir]}).decode()
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/hostedtoolcache/Python/3.11.2/x64/lib/python3.11/site-packages/onlinejudge_verify/languages/user_defined.py", line 71, in bundle
    return subprocess.check_output(shlex.split(command))
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/hostedtoolcache/Python/3.11.2/x64/lib/python3.11/subprocess.py", line 466, in check_output
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/hostedtoolcache/Python/3.11.2/x64/lib/python3.11/subprocess.py", line 571, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['false']' returned non-zero exit status 1.

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