update

CMakeLists.txt

@@ -3,10 +3,10 @@ cmake_minimum_required(VERSION 3.10)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 add_compile_options(-Wall)
 
-set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD 26)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
-
+add_compile_options(-fexperimental-new-constant-interpreter)
 if(NOT CMAKE_BUILD_TYPE)
     set(CMAKE_BUILD_TYPE Debug)
 endif()

src/11/c5/c5_tree.cpp

@@ -0,0 +1,42 @@
+#include <iostream>
+#include <fstream>
+
+using namespace std;
+
+int tree[114514][2]; 
+int root;         
+int nodeCount;    
+
+void input() {
+    ifstream inFile("dfs.in");
+    inFile >> nodeCount; 
+    for (int i = 0; i < 109; i++) {
+        tree[i][0] = -1; 
+        tree[i][1] = -1; 
+    }
+    for (int i = 1; i <= nodeCount; i++) {
+        int parent, leftChild, rightChild;
+        inFile >> parent >> leftChild >> rightChild;
+        tree[parent][0] = leftChild;   
+        tree[parent][1] = rightChild;  
+    }
+    inFile.close();
+}
+
+void dfs(int curNode) {
+    cout << curNode << " "; 
+    if (tree[curNode][0] != -1) { 
+        dfs(tree[curNode][0]); 
+    }
+    if (tree[curNode][1] != -1) { 
+        dfs(tree[curNode][1]); 
+    }
+}
+
+
+int main() {
+    input(); 
+    root = 1; 
+    dfs(root); 
+    return 0;
+}

src/11/helloworld/helloworld.cpp

@@ -1,22 +1,16 @@
+#include <array>
+#include <cstdint>
 #include <iostream>
-#include <memory>
-int main(){
+#include <utility>
+#include <vector>
 using namespace std;
-    struct X{
-        X(int const& x){cout<<"X is constructing: "<<x<<'\n';}
-        ~X(){cout<<"X is dead\n";}
-    };
-    struct T{
-        T():t{1}{};
-        int t;
-    };
+using ll = int64_t;
 
-    auto b = make_unique<X>(1);
-    int t{5};
-    while(t--){
-        T t;
-        cout<<t.t<<'\n';
-    }
-    cout<<"retrun 0;\n";
-    return 0;
+ll const maxn=1e5+5;
+// vector<vector<pair<ll, ll>>> v(maxn);
+vector<vector<pair<ll, ll>>> arr(maxn);
+
+int main(){    
+    
+    cout<<"hello world!\n";
 }