Please format it or link to a solution - the forum software has manged it and it won’t compile 
Edit:
It’s now failing for the testcase:
1
5 2
2 -1 -1 -1 -1
Please format it or link to a solution - the forum software has manged it and it won’t compile
Edit:
It’s now failing for the testcase:
1
5 2
2 -1 -1 -1 -1