'commit'

2025-08-30 18:35:01 +08:00
commit 1f397eca87
6258 changed files with 1487241 additions and 0 deletions
--- a/TangDou/XiTi/1454.cpp
+++ b/TangDou/XiTi/1454.cpp
@@ -0,0 +1,10 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    int n;
+    cin >> n;
+    cout << (1 + n) * n / 2 << endl;
+    return 0;
+}