System to collect contributions from other people

Contributing.md

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+### Contributing to 1brc-perl
+
+1) Fork the project.
+2) Create a branch from master.
+3) Create a new folder in the Submissions folder with a name for your new example (e.g. BRC_<github_id>)
+4) Develop and test your script (appropriately named e.g. BRC_<github_id>_<strategy>.pl) to work on the test file. This should be executable using
+    `perl  <path_to_script_folder>/BRC_<github_id>_<strategy>.pl test.txt` when run in the same folder as the test file. multiple strategies can be submitted.
+5) Add a ReadMe.md file that describes the technique/modules used, and optionally the performance you obtained with specs of your hardware
+6) Push this branch to your GitHub project.
+7) Do a Pull Request on GitHub once you arre happy with your submission

Submissions/BRC_saiftynet/BRC_saiftynet_basic.pl

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+use strict;use warnings;
+my $data={};                               # hash for collecting data
+while(<>){
+	my ($city,$temp)=split(';');             # get city and temperature 
+	$temp=~s/\.//;                           # remove decimal point
+	use integer;                             # speeds up by 10%
+	if ($data->{$city}){
+		my $cd=$data->{$city};                 # create a local copy to speed up access for calculations
+		 if ($temp>$cd->{max}){                # max
+			 $cd->{max}=$temp;
+		 }
+		 elsif ($temp<$cd->{min}){             # min
+			 $cd->{min}=$temp;
+		}
+		$cd->{mean}=($cd->{number}*$cd->{mean}+$temp)/($cd->{number}+1);  # mean
+		$cd->{number}++;                       # count
+	}
+	else {
+		$data->{$city}={max=>$temp,min=>$temp,mean=>$temp,number=>1} # initialise city
+	}
+}
+
+print"{";
+for (sort keys %$data){                   # print results
+	my $cd=$data->{$_};
+	print $_,";",$cd->{min}/10,"/",($cd->{mean}+5)/10,"/",$cd->{max}/10,", ";
+}
+print"}\n\n";

Submissions/BRC_saiftynet/README.md

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+### Saiftynet attempts
+
+Basic. The template for future versions no modules uses a hash rather an array. Removes decimal point and uses `integer`.

Submissions/README.md

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+### Submissions
+
+Each folder in this folder contains a submission (or set of submissions) along with a description of how these submissons tackle the task