Doubt in lecture

#1

how can we set an integer to infinity did not understand it

#2

Hey @harryson
You can set something to infinity in two ways:

  1. the one sir used,
    const int inf = (int)1e9
    int var = inf;

  2. set the variable to INT_MAX(which is the maximum integer)
    int var = INT_MAX;

Whenever we need to find minimum of something, it’s a good practice to set the thing initially as infinity. Now suppose you’ve to find min element in an array of size n
you can write like:
int ans = INT_MAX;
for(int i = 0; i < n; i++){
if(arr[i] < ans) ans = arr[i];
}

here setting initially to infinity is useful because we need to compare some elements and find min, and all of them will be smaller than INT_MAX, so it’s suitable.
In similar way in the question, you need to find min of q1, q2, q3, so you set them to INT_MAX initially in any of the above two ways i described.

#3

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