delete pics to save space

history_source/信息学奥赛一本通/1.6.2.1t.cpp

@@ -0,0 +1,14 @@
+#include<cstdio>
+using namespace std;
+int f(int n)
+{
+	if(n==1) return 1;
+	return n+f(n-1);
+}
+int main()
+{
+	int n;
+	scanf("%d",&n);
+	printf("%d\n",f(n));
+	return 0;
+}