Hi, guys!
Can't move throw #11 test. Need help.
I just have build tree, and in every step removing smallest leaf.
At last, I count sum of left leaf's weight and print it.
But, algorithm don't pass at #11 test.
Thanks

7 3
1 2 12
1 3 1
2 4 30
2 5 30
3 6 30
3 7 30
Correct answer is 72, your answer 61