delete pics to save space

history_source/信息学奥赛一本通/1.4.4.3.cpp

@@ -0,0 +1,18 @@
+#include<cstdio>
+#include<cmath> 
+using namespace std;
+int main()
+{
+	float x;
+	int n;
+	scanf("%f%d",&x,&n);
+	float ans=0,times=1;
+	for(int i=0;i<=n;i++)
+	{
+		ans+=times;
+		times*=x;
+	}
+	printf("%f\n",ans);
+	return 0;
+}
+