delete pics to save space

history_source/ccf 入门篇/U4/4.3.5.cpp

@@ -0,0 +1,32 @@
+#include<cstdio> 
+using namespace std;
+int main()
+{
+	int x=1,y=1,n;
+	scanf("%d",&n);
+	bool f=1;
+	for(int i=1;i<n;i++)
+	{
+		if(f)
+		{
+			if(y>1) y--,x++;
+			else
+			{
+				f=0;
+				x++;
+			}
+		}
+		else
+		{
+			if(x>1) x--,y++;
+			else
+			{
+				f=1;
+				y++;
+			}
+		}
+	}
+	printf("%d/%d\n",y,x);
+	return 0;
+}
+