842. 排列数字

https://www.acwing.com/problem/content/submission/code_detail/6187818/

AcWing/842/842.cpp

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+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    int n, a[10];
+    cin >> n;
+    for (int i = 0; i < n; i++) {
+        a[i] = i + 1;
+    }
+    do {
+        for (int i = 0; i < n; i++) {
+            cout << a[i] << ' ';
+        }
+        cout << endl;
+    } while (next_permutation(a, a + n));
+    return 0;
+}