diff --git a/.vscode/tasks.json b/.vscode/tasks.json
new file mode 100644
index 0000000..05054c5
--- /dev/null
+++ b/.vscode/tasks.json
@@ -0,0 +1,28 @@
+{
+    "tasks": [
+        {
+            "type": "cppbuild",
+            "label": "C/C++: g++ build active file",
+            "command": "/usr/bin/g++",
+            "args": [
+                "-fdiagnostics-color=always",
+                "-g",
+                "${file}",
+                "-o",
+                "${fileDirname}/${fileBasenameNoExtension}"
+            ],
+            "options": {
+                "cwd": "${fileDirname}"
+            },
+            "problemMatcher": [
+                "$gcc"
+            ],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "detail": "Task generated by Debugger."
+        }
+    ],
+    "version": "2.0.0"
+}
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diff --git a/hf2/hf4/3 b/hf2/hf4/3
new file mode 100755
index 0000000..e4281f7
Binary files /dev/null and b/hf2/hf4/3 differ
diff --git a/hf2/hf6/1 b/hf2/hf6/1
new file mode 100755
index 0000000..cfb34ad
Binary files /dev/null and b/hf2/hf6/1 differ
diff --git a/hf2/hf6/1.cpp b/hf2/hf6/1.cpp
new file mode 100644
index 0000000..8fd4711
--- /dev/null
+++ b/hf2/hf6/1.cpp
@@ -0,0 +1,47 @@
+#include <bits/stdc++.h>
+#include <iostream>
+using namespace std;
+
+int convert(string a) {
+    int out = 0;
+    int counter = 1;
+    
+    //cout<<a<<endl;
+    for (int i = a.size() - 1; i > 0; i--) {
+        if(a[i] == '1' ) {
+            out += counter;
+            //cout<<"found one at "<< a[i] ;
+        }  
+        //cout<< " current index "<< i <<" at character "<<a[i]<< " counter " << counter<<" current output " << out<<endl;
+        counter *= 2;
+    }
+    return out;
+
+}
+string convertToBase(int n, int base) {
+    string out;
+    return out;
+}
+
+int returnVecMax(vector<int> a) {
+    int out = a[0];
+    for (int i =1; i < a.size(); i++) {
+        if (a[i] > out) {
+            out = a[i];
+        }
+    }
+    return out;
+}
+
+int main() {
+
+    vector<int> test;
+    test.push_back(2);
+    test.push_back(6);
+    test.push_back(-7);
+    test.push_back(1);
+    test.push_back(0);
+    test.push_back(1);
+    test.push_back(4);
+    cout<<returnVecMax(test)<<endl<<convert("0101101");
+}
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diff --git a/hf2/hf6/3 b/hf2/hf6/3
new file mode 100755
index 0000000..80b41fc
Binary files /dev/null and b/hf2/hf6/3 differ
diff --git a/hf2/hf6/3.cpp b/hf2/hf6/3.cpp
new file mode 100644
index 0000000..2859ec4
--- /dev/null
+++ b/hf2/hf6/3.cpp
@@ -0,0 +1,33 @@
+#include <bits/stdc++.h>
+#include <iostream>
+using namespace std;
+
+int returnVecMax(vector<int> a) {
+    int max = a[0];
+    int index = 0;
+    for (int i =1; i < a.size(); i++) {
+        if (a[i] > max) {
+            max = a[i];
+            index = i;
+        }
+    }
+    return index;
+}
+
+int main () {
+   int o, n, m, t, h;
+   cin >> o >> n >> m >> t >> h; //orak szama, tantargyak szama, egy sorszama, egy nap sorszama
+   int ts, tts, nap, ora; // tanar sorszam, tanitott tantargy sorszam, nap, ora
+   
+   vector<int> tantargyElofordulas(n);
+
+   for (int i = 0; i < o; i++) {
+    cin >> ts >>tts>>nap>>ora;
+    tantargyElofordulas[ts] += 1;
+
+   }
+//    for (int i = 0; i < tantargyElofordulas.size(); i++) {
+//     cout<<tantargyElofordulas[i]<<endl;
+//    }
+   cout<<returnVecMax(tantargyElofordulas) + 1;
+}
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