use multipass dir

Author: mzuenni

bin/run.py

@@ -207,7 +207,9 @@ def _continue_with_tle(self, verdict, timeout_expired):
     def _prepare_nextpass(self, nextpass):
         if not nextpass or not nextpass.is_file():
             return False
-        # clear all files outside of feedbackdir
+        # TODO: keep feedback files and concatenate them?
+        #  - judgemessage.txt
+        #  - judgeerror.txt
         for f in self.tmpdir.iterdir():
             if f == self.feedbackdir:
                 continue
@@ -216,7 +218,15 @@ def _prepare_nextpass(self, nextpass):
             elif f.exists():
                 shutil.rmtree(f)
         # use nextpass.in as next input
-        shutil.move(nextpass, self.in_path)
+        nextpass.rename(self.in_path)
+        # clear all files outside of "feedbackdir / multipass"
+        for f in self.feedbackdir.iterdir():
+            if f == self.feedbackdir / "multipass":
+                continue
+            if f.is_file():
+                f.unlink()
+            elif f.exists():
+                shutil.rmtree(f)
         return True
 
     def _validate_output(self, bar: BAR_TYPE) -> Optional[ExecResult]:
@@ -441,7 +451,7 @@ def process_run(run: Run):
             for f in run.feedbackdir.iterdir():
                 if f.name.startswith("."):
                     continue  # skip "hidden" files
-                if f.name in ["judgemessage.txt", "judgeerror.txt"]:
+                if f.name in ["judgemessage.txt", "judgeerror.txt", "multipass"]:
                     continue
                 if f.name.startswith("judgeimage.") or f.name.startswith("teamimage."):
                     data += f"{f.name}: {shorten_path(self.problem, f.parent) / f.name}\n"

bin/validate.py

@@ -403,6 +403,9 @@ def run(
         cwd, constraints_path, arglist = self._run_helper(testcase, constraints, args)
         if not isinstance(mode, Mode):
             cwd = mode.feedbackdir
+        if self.problem.multi_pass:
+            multipassdir = cwd / "multipass"
+            multipassdir.mkdir(parents=True, exist_ok=True)
         invocation = self.run_command + [in_path, ans_path, cwd]
 
         with path.open("rb") as file:

test/problems/alternativeencryption/output_validator/validate.h

@@ -1572,30 +1572,30 @@ namespace Multipass {
 	void init() {
 		judgeAssert<std::logic_error>(::details::initialized(), "validate.h: Multipass::init() was called before init(argc, argv)!");
 
-		auto path = std::filesystem::path(arguments[3]) / ".pass";
+		auto multipassdir = std::filesystem::path(arguments[3]) / "multipass";
+		auto passfile = multipassdir / ".pass";
 		std::string nextfile = ".state0";
 		std::string prevfile = ".state1";
-		if (std::filesystem::exists(path)) {
-			std::ifstream in(path);
+		if (std::filesystem::exists(passfile)) {
+			std::ifstream in(passfile);
 			in >> pass;
 			pass++;
 			if ((pass & 1) != 0) {
 				std::swap(nextfile, prevfile);
 			}
-			prevstate = InputStream(std::filesystem::path(arguments[3]) / prevfile, false, true, juryOut, Verdicts::FAIL);
+			prevstate = InputStream(multipassdir / prevfile, false, true, juryOut, Verdicts::FAIL);
 		} else {
 			pass = 0;
 		}
-		std::filesystem::remove(std::filesystem::path(arguments[3]) / nextfile);
-		nextstate = OutputStream(std::filesystem::path(arguments[3]) / nextfile, std::ios::out);
+		std::filesystem::remove(multipassdir / nextfile);
+		nextstate = OutputStream(multipassdir / nextfile, std::ios::out);
 		nextpass = OutputStream(details::nextpassBuffer);
-		std::ofstream out(path);
-		out << pass;
+		std::ofstream(passfile) << pass;
 	}
 
 	[[noreturn]] void NEXT() {
 		{
-			std::ofstream file(std::filesystem::path(arguments[3]) / "nextpass.in");
+			std::ofstream file(std::filesystem::path(arguments[3]) / "nextpass.in"); // this should not be in the multipass subdirectory!
 			judgeAssert<std::runtime_error>(file.good(), "NEXT(): Could not open file: nextpass.in");
 			file << details::nextpassBuffer.str();
 		}

test/problems/alternativeencryption/problem.yaml

@@ -1,16 +1,12 @@
 problem_format_version: 2023-07-draft
 type: multi-pass
 name:
-  #lang: name
   en: Alternative Encryption
 credits:
-# Contest name and year
   authors: Thomas Beuman
 source:
   name: NWERC 2024 Test Session
   url: https://2024.nwerc.eu
 uuid: 8ee7605a-95a3-86c2-3995-0a10d365de46
 license: cc by-sa
 rights_owner: author
-limits:
-  time_limit: 1.0

test/problems/alternativeencryption/solution/solution.en.tex

@@ -0,0 +1,30 @@
+\begin{frame}
+    \frametitle{\problemtitle}
+    \begin{block}{Problem}
+        This is a multi-pass problem, where in each pass, you should:
+        \vspace{-0.5em}
+        \begin{enumerate}
+            \item Encrypt text, such that the length stays the same and every character differs.
+            \item Decrypt the text that you encrypted, such that you retrieve the original input.
+        \end{enumerate}
+    \end{block}
+    \pause
+    \begin{block}{Solution}
+        Some of the many possible solutions (there were some resubmissions):
+        \begin{itemize}
+            \addtolength{\leftmargini}{15ex}
+            \small
+            \item ($70\times$) Use a Caesar cipher with offset $1 \leq x < 26$ for encrypting, and offset $26 - x$ for decrypting.
+            \item ($14\times$) Use a Caesar cipher with offset $13$ for both encrypting and decrypting.
+            \item ($2\times$) Assuming $0$-based \texttt{char} values, XOR the last bit of each value
+                (`\texttt{a}' $\leftrightarrow$ `\texttt{b}',
+                `\texttt{c}' $\leftrightarrow$ `\texttt{d}', \dots).
+            \item ($1\times$) Atbash: Mirror the characters (`\texttt{a}' $\leftrightarrow$ `\texttt{z}',
+            `\texttt{b}' $\leftrightarrow$ `\texttt{y}', \dots)
+            for both encrypting and decrypting.
+            \item ($1\times$) Generate a (seeded) random permutation to encrypt, and use its inverse to decrypt.
+        \end{itemize}
+    \end{block}
+    \pause
+    \solvestats
+\end{frame}

test/problems/alternativeencryption/submissions/run_time_error/ragnar-write-to-hidden-file.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+from pathlib import Path
+
+mode = input()
+n = int(input())
+
+
+def rot(x):
+    return chr(ord("a") + (ord(x) - ord("a") + 13) % 26)
+
+
+words = []
+
+for _ in range(n):
+    word = input()
+    words.append(word)
+    print(*(rot(x) for x in word), sep="")
+
+file = Path(".data")
+if mode == "encrypt":
+    file.write_text("\n".join(words))
+if mode == "decrypt":
+    words = file.read_text()

test/problems/alternativeencryption/submissions/run_time_error/ragnar-write-to-local-file.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+from pathlib import Path
+
+mode = input()
+n = int(input())
+
+
+def rot(x):
+    return chr(ord("a") + (ord(x) - ord("a") + 13) % 26)
+
+
+words = []
+
+for _ in range(n):
+    word = input()
+    words.append(word)
+    print(*(rot(x) for x in word), sep="")
+
+file = Path("data")
+if mode == "encrypt":
+    file.write_text("\n".join(words))
+if mode == "decrypt":
+    words = file.read_text()

test/problems/alternativeencryption/submissions/run_time_error/ragnar-write-to-tmp-file.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+from pathlib import Path
+
+mode = input()
+n = int(input())
+
+
+def rot(x):
+    return chr(ord("a") + (ord(x) - ord("a") + 13) % 26)
+
+
+words = []
+
+for _ in range(n):
+    word = input()
+    words.append(word)
+    print(*(rot(x) for x in word), sep="")
+
+file = Path("/tmp/nwerc_alternativeencryption_data")
+if mode == "encrypt":
+    file.write_text("\n".join(words))
+if mode == "decrypt":
+    words = file.read_text()

test/problems/interactivemultipass/output_validator/interctive_multipass_validator.py

@@ -2,19 +2,38 @@
 import sys
 import pathlib
 
+
+def wrong_answer(message: str):
+    judgemessage = pathlib.Path(sys.argv[3]) / "judgemessage.txt"
+    judgemessage.write_text(message)
+    sys.exit(43)  # WA
+
+
 test_in = int(pathlib.Path(sys.argv[1]).read_text())
 print(test_in)  # Simulate behaviour of normal multipass problem
-team_ans = int(input())
+try:
+    team_ans_string = input()
+    try:
+        team_ans = int(team_ans_string)
+    except ValueError:
+        wrong_answer(f"team output '{team_ans_string}' is not an integer")
+except EOFError:
+    wrong_answer("no input from team")
+
 if test_in < 0:
     # first pass
     if team_ans < 0:
-        sys.exit(43)  # WA
+        wrong_answer(f"1st pass: team output ({team_ans}) is negative")
     nextpass = pathlib.Path(sys.argv[3]) / "nextpass.in"
     nextpass.write_text(str(team_ans))
     sys.exit(42)  # AC + nextpass.in => next run
 else:
     # second pass
-    if test_in == team_ans:
-        sys.exit(42)  # AC
-    else:
-        sys.exit(43)  # WA
+    if test_in != team_ans:
+        wrong_answer(f"2nd pass: team output ({team_ans}) is not equal to test input ({test_in})")
+
+try:
+    more_input = input()
+    wrong_answer(f'extra input from team, starting with "{more_input}"')
+except EOFError:
+    sys.exit(42)  # AC