B. Trees in a Rowtime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputThe Queen of England has n trees growing in a row in her garden. At that, the i-th (1 ≤ i ≤ n) tree from the left has height ai meters. Today the Queen decided to update the scenery of her garden. She wants the trees' heights to meet the condition: for all i (1 ≤ i < n), ai + 1 - ai = k, where k is the number the Queen chose.Unfortunately, the royal gardener is not a machine and he cannot fulfill the desire of the Queen instantly! In one minute, the gardener can either decrease the height of a tree to any positive integer height or increase the height of a tree to any positive integer height. How should the royal gardener act to fulfill a whim of Her Majesty in the minimum number of minutes?InputThe first line contains two space-separated integers: n, k (1 ≤ n, k ≤ 1000). The second line contains n space-separated integers a1, a2, ..., an (1 ≤ ai ≤ 1000) — the heights of the trees in the row. OutputIn the first line print a single integer p — the minimum number of minutes the gardener needs. In the next p lines print the description of his actions. If the gardener needs to increase the height of the j-th (1 ≤ j ≤ n) tree from the left by x (x ≥ 1) meters, then print in the corresponding line "+ j x". If the gardener needs to decrease the height of the j-th (1 ≤ j ≤ n) tree from the left by x (x ≥ 1) meters, print on the corresponding line "- j x".If there are multiple ways to make a row of trees beautiful in the minimum number of actions, you are allowed to print any of them.ExamplesInput4 11 2 1 5Output2+ 3 2- 4 1Input4 11 2 3 4Output0
Input4 11 2 1 5
Output2+ 3 2- 4 1
['brute force', 'implementation', '*1400']