Create 0773_Sliding_Puzzle.cpp

0773_Sliding_Puzzle.cpp

@@ -0,0 +1,60 @@
+// ███████╗  █████╗  ███╗   ██╗ ██████╗   █████╗  ██████╗  ██████╗  ██╗  ██╗
+// ██╔════╝ ██╔══██╗ ████╗  ██║ ██╔══██╗ ██╔══██╗ ██╔══██╗ ██╔══██╗ ██║  ██║
+// ███████╗ ███████║ ██╔██╗ ██║ ██║  ██║ ███████║ ██████╔╝ ██████╔╝ ███████║
+// ╚════██║ ██╔══██║ ██║╚██╗██║ ██║  ██║ ██╔══██║ ██╔═██╗  ██╔══██╗ ██╔══██║
+// ███████║ ██║  ██║ ██║ ╚████║ ██████╔╝ ██║  ██║ ██║  ██╗ ██████╔╝ ██║  ██║
+// ╚══════╝ ╚═╝  ╚═╝ ╚═╝  ╚═══╝ ╚═════╝  ╚═╝  ╚═╝ ╚═╝  ╚═╝ ╚═════╝  ╚═╝  ╚═╝
+#pragma GCC optimize("Ofast", "inline", "ffast-math", "unroll-loops","no-stack-protector")
+#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native", "f16c")
+auto init = []() {
+    ios_base::sync_with_stdio(false);
+    cin.tie(nullptr);
+    cout.tie(nullptr);
+    return 'c';
+}();
+class Solution {
+public:
+    int slidingPuzzle(vector<vector<int>>& board) {
+        string start = "";
+        string target = "123450";
+        unordered_map<int, vector<int>> mp = {
+            {0, {1, 3}},
+            {1, {0, 2, 4}},
+            {2, {1, 5}},
+            {3, {0, 4}},
+            {4, {1, 3, 5}},
+            {5, {2, 4}}
+        };
+        for(int i=0; i<2; i++){
+            for(int j=0; j<3; j++){
+                start += (board[i][j] + '0');
+            }
+        }
+        queue<string> qu;
+        qu.push(start);
+        unordered_set<string> vist;
+        vist.insert(start);
+        int lev =0;
+        while(!qu.empty()){
+            int n = qu.size();
+            while(n--){
+                string s = qu.front();
+                qu.pop();
+                if(s == target){
+                    return lev;
+                }
+                int i = s.find('0');
+                for(int j : mp[i]){
+                    string ss = s;
+                    swap(ss[i], ss[j]);
+                    if(!vist.count(ss)){
+                        vist.insert(ss);
+                        qu.push(ss);
+                    }
+                }
+            }
+            lev++;
+        }
+        return -1;
+    }
+};