Problem C. 1261. (December 2014)
C. 1261. How many sets of three positive integers are there in which the sum of the numbers is 30, and the sum of any two numbers is greater than the third number?
(5 pont)
Deadline expired on 12 January 2015.
Statistics:
235 students sent a solution.  
5 points:  119 students. 
4 points:  54 students. 
3 points:  36 students. 
2 points:  12 students. 
1 point:  12 students. 
0 point:  1 student. 
Unfair, not evaluated:  1 solution. 
