Yes, you are right I forgot to add this condition outside the loop

if(start==end && people[start]<=limit) count++;

You can't put while(x<=y) because

if number of people are even like, people={80,60,60,50,20,20,20}

then the result will be 5 but it should be 4.

It will count 1 person 2 times when size of array is even.