diff --git a/POJ/3299_小優YoU.cpp b/POJ/3299_小優YoU.cpp
new file mode 100644
index 0000000..eab82f9
--- /dev/null
+++ b/POJ/3299_小優YoU.cpp
@@ -0,0 +1,38 @@
+//Memory   Time 
+//240K      0MS 
+
+#include<iostream>
+#include<math.h>
+#include<string>
+#include<iomanip>
+using namespace std;
+int main(void)
+{
+	char alpha;
+	double t,d,h;
+	int i;
+	for(;;)
+	{
+		t=d=h=200;    //三个参数的范围默认都是在-100 ~ 100
+		for(i=0;i<2;i++)
+		{
+			cin>>alpha;
+			if(alpha=='E')
+				return 0;
+			else if(alpha=='T')
+			    cin>>t;
+			else if(alpha=='D')
+				cin>>d;
+			else if(alpha=='H')
+				cin>>h;
+		}
+		if(h==200)
+			h=t+0.5555*(6.11*exp(5417.7530*(1/273.16-1/(d+273.16)))-10);
+		else if(t==200)
+			t=h-0.5555*(6.11*exp(5417.7530*(1/273.16-1/(d+273.16)))-10);
+		else if(d==200)
+			d=1/((1/273.16)-((log((((h-t)/0.5555)+10.0)/6.11))/5417.7530))-273.16;
+		cout<<setprecision(1)<<fixed<<"T "<<t<<" D "<<d<<" H "<<h<<endl;
+	}
+	return 0;
+}