feat(bfs, backtracking): new problem formated

sliding-puzzle/src/ac.cpp

@@ -0,0 +1,59 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int N = 6;
+unordered_set<string> games;
+queue<pair<string, int>> q;
+
+void addGame(int i, int j, string &s)
+{
+   swap(s[i], s[j]);
+   if (!games.count(s))
+      q.emplace(s, j);
+   games.insert(s);
+   swap(s[i], s[j]);
+}
+
+int bfs(string target)
+{
+   q.push({"123450", 5});
+   int depth = 0;
+   while (!q.empty())
+   {
+      int n = (int)q.size();
+      while (n--)
+      {
+         auto [s, zeroPos] = q.front();
+         q.pop();
+         if (s == target)
+            return depth;
+         int up = zeroPos - 3, down = zeroPos + 3, left = zeroPos - 1, right = zeroPos + 1;
+         if (up >= 0)
+            addGame(zeroPos, up, s);
+         if (down < N)
+            addGame(zeroPos, down, s);
+         if (left >= 0 && zeroPos != 3)
+            addGame(zeroPos, left, s); // 3 is the down left side
+         if (right < N && zeroPos != 2)
+            addGame(zeroPos, right, s); // 2 is the top right side
+      }
+
+      depth++;
+   }
+
+   return -1;
+}
+
+int main()
+{
+   vector<string> board(2);
+   for (int i = 0; i < 2; i++)
+   {
+      cin >> board[i];
+   }
+
+   cout << bfs((board[0] + board[1])) << endl;
+
+   return 0;
+}

sliding-puzzle/src/checker.cpp

@@ -0,0 +1,19 @@
+#include "testlib.h"
+#include <bits/stdc++.h>
+
+
+using namespace std;
+
+
+int main(int argc, char* argv[]) {
+    setName("compare two signed int%d's", 8 * int(sizeof(int)));
+    registerTestlibCmd(argc, argv);
+
+    int ja = ans.readInt();
+    int pa = ouf.readInt();
+
+    if (ja != pa)
+        quitf(_wa, "expected %d, found %d", ja, pa);
+
+    quitf(_ok, "answer is %d", ja);
+}

sliding-puzzle/src/generator.cpp

@@ -0,0 +1,73 @@
+#include "testlib.h"
+#include <bits/stdc++.h>
+
+using namespace std;
+
+const int MIN_N = 0;
+const int MAX_N = 100;
+
+const int rnd_test_n = 100;
+
+template <typename T> void append(vector<T> &dest, const vector<T> &orig) {
+	dest.insert(dest.end(), orig.begin(), orig.end());
+}
+
+string output_tc(string top, string bottom) {
+	ostringstream oss;
+    oss << top << endl << bottom << endl;
+	return oss.str();
+}
+
+vector<string> generate_sample_tests() {
+	vector<string> tests;
+    tests.push_back(output_tc("412", "503"));
+    tests.push_back(output_tc("123", "540"));
+    tests.push_back(output_tc("123", "405"));
+	return tests;
+}
+
+vector<string> generate_manual_tests() {
+	vector<string> tests;
+	tests.push_back(output_tc("413", "025"));
+	tests.push_back(output_tc("152", "403"));
+	return tests;
+}
+
+string rnd_test(int i){
+    string start = "012345";
+    while (i-- && next_permutation(start.begin(), start.end())) {}
+    return output_tc(start.substr(0, 3), start.substr(3));
+}
+
+vector<string> generate_random_tests() { 
+    vector<string> tests;
+    for (int i = 0; i < rnd_test_n; i++){
+        tests.push_back(rnd_test(i));
+    } 
+    return tests;
+}
+
+string extreme_test_1(){
+    return(output_tc("123", "450"));
+}
+
+vector<string> generate_extreme_tests(){
+    vector<string> tests;   
+    tests.push_back(extreme_test_1());
+    return tests;
+}
+
+int main(int argc, char *argv[]) {
+	registerGen(argc, argv, 1);
+	vector<string> tests;
+	size_t test = 0;
+	append(tests, generate_sample_tests());
+	append(tests, generate_manual_tests());
+	append(tests, generate_random_tests());
+	append(tests, generate_extreme_tests());
+	for (const auto &t : tests) {
+		startTest(++test);
+		cout << t;
+	}
+	return 0;
+}

sliding-puzzle/src/script.sh

@@ -0,0 +1 @@
+generator

sliding-puzzle/src/validator.cpp

@@ -0,0 +1,24 @@
+#include "testlib.h"
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main(int argc, char *argv[])
+{
+    registerValidation(argc, argv);
+
+    string game = inf.readToken("[0-5]{3}", "top");
+    inf.readEoln();
+    game += inf.readToken("[0-5]{3}", "bottom");
+    inf.readEoln();
+    inf.readEof();
+
+    vector<bool> nums(6, false);
+    for (char c : game)
+    {
+        ensuref(!nums[c - '0'], "Repeated occurence of number %c", c);
+        nums[c - '0'] = true;
+    }
+
+    return 0;
+}