Query regarding the question

#1

I’m unable to pass the test case wth 10^15 constraint.
Could someone help me, please. I know my funtion is returning 0, but how to calculate exponential value for long long int.
Link to my code: https://ide.codingblocks.com/s/204977
Thanks.

#2

dont calculate using the power function. Since x would be small, Try to multiply it linearly.
bool flag=1;
long long tmp=1;
for(int i=1;i<=k;i++)
{
tmpc*= mid;
if(tmp>n)
{
flag=0;
break;
}
}

#3

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