CF612F.Simba on the Circle

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通过率:0%

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题目描述

You are given a circular array with nn elements. The elements are numbered from some element with values from 11 to nn in clockwise order. The ii -th cell contains the value aia_{i} . The robot Simba is in cell ss .

Each moment of time the robot is in some of the nn cells (at the begin he is in ss ). In one turn the robot can write out the number written in current cell or move to the adjacent cell in clockwise or counterclockwise direction. To write out the number from the cell Simba doesn't spend any time, but to move to adjacent cell Simba spends one unit of time.

Simba wants to write the number from each cell one time, so the numbers will be written in a non decreasing order. Find the least number of time units to write out all numbers.

输入格式

The first line contains two integers nn and ss ( 1<=s<=n<=20001<=s<=n<=2000 ) — the number of cells in the circular array and the starting position of Simba.

The second line contains nn integers aia_{i} ( 109<=ai<=109-10^{9}<=a_{i}<=10^{9} ) — the number written in the ii -th cell. The numbers are given for cells in order from 11 to nn . Some of numbers aia_{i} can be equal.

输出格式

In the first line print the number tt — the least number of time units.

Each of the next nn lines should contain the direction of robot movement and the number of cells to move in that direction. After that movement the robot writes out the number from the cell in which it turns out. The direction and the number of cells should be printed in the form of +x in case of clockwise movement and -x in case of counterclockwise movement to xx cells ( 0<=x<=n10<=x<=n-1 ).

Note that the sum of absolute values of xx should be equal to tt .

输入输出样例

  • 输入#1

    9 1
    0 1 2 2 2 1 0 1 1
    

    输出#1

    12
    +0
    -3
    -1
    +2
    +1
    +2
    +1
    +1
    +1
    
  • 输入#2

    8 1
    0 1 0 1 0 1 0 1
    

    输出#2

    13
    +0
    +2
    +2
    +2
    -1
    +2
    +2
    +2
    
  • 输入#3

    8 1
    1 2 3 4 5 6 7 8
    

    输出#3

    7
    +0
    +1
    +1
    +1
    +1
    +1
    +1
    +1
    
  • 输入#4

    8 1
    0 0 0 0 0 0 0 0
    

    输出#4

    7
    +0
    +1
    +1
    +1
    +1
    +1
    +1
    +1
    
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