Initial commit

test99-3-1.cpp

@@ -0,0 +1,34 @@
+#include<bits/stdc++.h>
+using namespace std;
+
+vector<vector<int>> results;
+
+void backtrack(vector<int>& current, vector<bool>& used, int n){
+    if(current.size() == n){
+        results.push_back(current);
+        return;
+    }
+    for(int i = 1; i <= n; i++){
+        if(!used[i]){
+            current.push_back(i);
+            used[i] = true;
+            backtrack(current, used, n);
+            current.pop_back();
+            used[i] = false;
+        }
+    }
+}
+
+int main(){
+    int n; cin >> n;
+    vector<int> current;
+    vector<bool> used(n+1, false);
+    backtrack(current, used, n);
+    for(const auto& perm:results){
+        for(int num:perm){
+            cout << num << " ";
+        }
+        cout << endl;
+    }
+    return 0;
+}