Althogh giving correct output but not passing testcase

@Mihir163 use long long int in your code

stil giving correct output but not passing testcase

while updating mincost you are trying to access a[n] (when i=n-1) which will give you run error for n=10^5, since max size of your array is 10^5.

can u plz modifies my code since i am not able rectifies it producing again error while submitting

look at this code https://ide.codingblocks.com/s/253182

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