
ZOJ Problem Set  4104
DreamGrid has just found an integer sequence $a_1, a_2, \dots, a_n$ in his right pocket. As DreamGrid is bored, he decides to play with the sequence. He can perform the following operation any number of times (including zero time): select an element and move it to the beginning of the sequence. What's the minimum number of operations needed to make the sequence nondecreasing? InputThere are multiple test cases. The first line of the input contains an integer $T$, indicating the number of test cases. For each test case: The first line contains an integer $n$ ($1 \le n \le 10^5$), indicating the length of the sequence. The second line contains $n$ integers $a_1, a_2, \dots, a_n$ ($1 \le a_i \le 10^9$), indicating the given sequence. It's guaranteed that the sum of $n$ of all test cases will not exceed $10^6$. OutputFor each test case output one line containing one integer, indicating the answer. Sample Input2 4 1 3 2 4 5 2 3 3 5 5 Sample Output2 0 HintFor the first sample test case, move the 3rd element to the front (so the sequence become {2, 1, 3, 4}), then move the 2nd element to the front (so the sequence become {1, 2, 3, 4}). Now the sequence is nondecreasing. For the second sample test case, as the sequence is already sorted, no operation is needed. Author: WENG, Caizhi Source: The 16th Zhejiang Provincial Collegiate Programming Contest Sponsored by TuSimple 