Hello everybody , please help me , i was solving problems in light oj , "curious Robin Hood" and getting wrong answer. problem link : http://lightoj.com/volume_showproblem.php?problem=1112

code link : https://paste.ubuntu.com/25753376/

i am a beginner and i recently learned a bit about segment tree , i used segment tree in this solution , but i can't find my faults , can anyone please help me ?