Only test case 0 is passing

@anubhavb11 this question has to be done with binary search

but whats wrong with my code?

@anubhavb11
one of the cases
10 3 1 1
ans = 6
yours = 10

code- https://ide.codingblocks.com/s/294793
still not passing all test case

@anubhavb11 just use long long int it passes all

@anubhavb11 is it ok now?

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