Codeforces Global Round 11 |
---|

Finished |

Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.

bitmasks

constructive algorithms

math

matrices

number theory

*2500

No tag edit access

The problem statement has recently been changed. View the changes.

×
E. Xum

time limit per test

2 secondsmemory limit per test

256 megabytesinput

standard inputoutput

standard outputYou have a blackboard and initially only an odd number $$$x$$$ is written on it. Your goal is to write the number $$$1$$$ on the blackboard.

You may write new numbers on the blackboard with the following two operations.

- You may take two numbers (not necessarily distinct) already on the blackboard and write their sum on the blackboard. The two numbers you have chosen remain on the blackboard.
- You may take two numbers (not necessarily distinct) already on the blackboard and write their bitwise XOR on the blackboard. The two numbers you have chosen remain on the blackboard.

Input

The single line of the input contains the odd integer $$$x$$$ ($$$3 \le x \le 999,999$$$).

Output

Print on the first line the number $$$q$$$ of operations you perform. Then $$$q$$$ lines should follow, each describing one operation.

- The "sum" operation is described by the line "$$$a$$$ + $$$b$$$", where $$$a, b$$$ must be integers already present on the blackboard.
- The "xor" operation is described by the line "$$$a$$$ ^ $$$b$$$", where $$$a, b$$$ must be integers already present on the blackboard.

You can perform at most $$$100,000$$$ operations (that is, $$$q\le 100,000$$$) and all numbers written on the blackboard must be in the range $$$[0, 5\cdot10^{18}]$$$. It can be proven that under such restrictions the required sequence of operations exists. You can output any suitable sequence of operations.

Examples

Input

3

Output

5 3 + 3 3 ^ 6 3 + 5 3 + 6 8 ^ 9

Input

123

Output

10 123 + 123 123 ^ 246 141 + 123 246 + 123 264 ^ 369 121 + 246 367 ^ 369 30 + 30 60 + 60 120 ^ 121

Codeforces (c) Copyright 2010-2023 Mike Mirzayanov

The only programming contests Web 2.0 platform

Server time: Jun/06/2023 09:15:16 (g2).

Desktop version, switch to mobile version.

Supported by

User lists

Name |
---|