Update 5723.cpp

Notes added. Fully Understood now.
2016-09-19 11:39:31 +08:00 · 2016-09-19 11:39:31 +08:00 · 2ad2d592ce
parent 48f40cd2f8
commit 2ad2d592ce
1 changed files with 5 additions and 0 deletions
--- a/HDOJ/5723.cpp
+++ b/HDOJ/5723.cpp
@ -107,6 +107,11 @@ int main()
        totalans=0;
        dfs(b);

+        /// What The Hell ?
+        /// This Type is WRONG:
+        ///     double ans=n*(n-1)/2.0;
+        /// But this type is Accepted !??
+        ///     double ans=0.5*n*(n-1);
        double tans=0.5*n*(n-1);
        /// Use Long Long?
        printf("%I64d %.2lf\n",sum,(double)totalans/tans);