Perform the dynamic range minimum query.
The first line of input will contain two space-separated integers: ~N~ ~(1 \le N \le 100\,000)~, the number of elements in the array, and ~M~ ~(1 \le M \le 100\,000)~, the number of operations to perform.
The next ~N~ lines each contain one non-negative integer less than ~1\,000\,000~. Specifically, line number ~i~ will contain element ~i - 2~ of the array. Note that the array has zero-based indexing.
The following ~M~ lines contain one operation each. Each operation is either of the form
M i x, indicating that element number ~i~ ~(0 \le i < N)~ is to be changed to ~x~ ~(0 \le x < 1\,000\,000)~, or the form
Q i j ~(0 \le i \le j < N)~ indicating that your program is to find the minimum value of the elements in the index range ~[i, j]~ (that is, inclusive) in the current state of the array and print this value to standard output.
One integer, on its own line, for each
Q statement: the answer to the query.
5 10 35232 390942 649675 224475 18709 Q 1 3 M 4 475689 Q 2 3 Q 1 3 Q 1 2 Q 3 3 Q 2 3 M 2 645514 M 2 680746 Q 0 4
224475 224475 224475 390942 224475 224475 35232