Challenges
Problem Statement
There are N students in a class and Teacher want to divide these students into some groups . Teacher told that groups consisting of two or less students not allowed , so Teacher want to have as many groups consisting of three or more students as possible.
Divide the students so that the number of groups consisting of three or more students is maximized.
Input
Single integer N
Output
Maximum number of groups can be formed
Constraints
1<=N<100000
Sample Input
6
Sample Output
2
Dcoded By: Rajat Gupta
Solved By: 4142
Maximum Marks: 5