归类了 OJ，整理了一下

XSM OJ 重庆小码王集团OJ/3n＋1问题.cpp

@@ -0,0 +1,25 @@
+#include <iostream>
+#include <cmath>
+#include <cstdlib>
+#include <cstdio>
+#include <iomanip>
+using namespace std;
+int main(){
+	int a;
+	int b=0;
+	cin >>a;
+	while(a>1){
+		if(a%2==1){
+			a=a*3+1;
+			b++;
+		}
+		if(a%2==0){
+			a=a/2;
+			b++;
+		}
+	}
+	cout <<b;
+	return 0;
+}
+
+