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Stange wrong answer on problem 143A (A. Help Vasilisa the Wise 2)
I was trying to submit this problem after ensuring the 4 test cases given in the problem, but I found it gives wrong answer in test 4. however, this test case I try it, and I'm sure my program output the correct answer
in the fourth test case
10 10
10 10
10 10
the answer is -1 and my program actually output -1, but in the submission it said my output is :
8 2
2 0
could anyone explain why !!
