In competitive programming what is this means Constraints: 1 <= T <= 200 1 <= N <= 107 1 <= D <= N 0 <= arr[i] <= 105?

Question

What is this means? please explain it properly?

Constraints:
1 <= T <= 200
1 <= N <= 107
1 <= D <= N
0 <= arr[i] <= 105

Answer 1

bro what is constraint please give me some examples

Answer 2

Thanks bro ✌✌✌

Answer 3

What do YOU mean ? What is it exactly you don't understand ?