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4 changed files with 17 additions and 354 deletions

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@ -1,12 +0,0 @@
image: "rust:latest"
stages:
- build
build-job:
stage: build
artifacts:
paths:
- target/release/skyums-protocol
script:
- cargo build --release

255
Cargo.lock generated
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@ -2,53 +2,12 @@
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@ -174,157 +61,15 @@ dependencies = [
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@ -2,16 +2,8 @@
name = "skyums-protocol"
version = "1.0.0"
edition = "2021"
authors = [ "Nicolás A. Ortega Froysa" ]
description = "An implementation of Skyum's Protocol."
readme = "./README.md"
repository = "https://gitlab.com/naortega/skyums-protocol"
license = "Zlib"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
rand = "0.8"
structopt = "0.3"
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"

View File

@ -24,116 +24,54 @@
extern crate rand;
use structopt::StructOpt;
use serde::{Serialize,Deserialize};
use serde_json::json;
fn main() {
let size = 100;
// define the commandline parameters
#[derive(StructOpt)]
#[structopt(about = "An implementation of the Skyum's Protocol.")]
struct Opt
{
#[structopt(short, long, default_value="100", help = "The number of inmates in the problem")]
size:u32,
#[structopt(long, help = "Print to stdout the JSON for the results")]
json:bool,
}
// define the prisoner data
#[derive(Serialize, Deserialize)]
struct Prisoner
{
// prisoner id number
id:u32,
// if the prisoner found his number
found:bool,
// number of attempt he found it in
attempts:u32,
}
fn main()
{
// read the commandline parameters
let opts = Opt::from_args();
// set number of prisoners in experiment
let size = opts.size;
// initialize the boxes with capacity for `size` number of boxes
// initialize the boxes with randomly assigned numbers
let mut boxes:Vec<u32> = Vec::with_capacity(size as usize);
{
// create vector of numbers to select randomly from
let mut nums:Vec<u32> = (0..size).collect();
while nums.len() > 0
{
// get a random index for nums
let rand_i:usize = rand::random::<usize>() % nums.len();
// add that element to the boxes vector
boxes.push(nums[rand_i]);
// remove the entry from the nums vector
nums.remove(rand_i);
}
}
// create the vector of prisoners
let mut prisoners:Vec<Prisoner> = Vec::with_capacity(size as usize);
// for every prisoner in the jail
// have prisoners find their number
let mut all_found = true;
for i in 0..size
{
// create the prisoner for index `i`
let mut prisoner_i = Prisoner {
// assign the id number
id: i,
// assume the prisoner does not find his box
found: false,
// set number of attempts to 0
attempts: 0,
};
// the next (first) box the prisoner is to open is the one with his number (`i`)
let mut next_box:usize = i as usize;
// while the prisoner still has attempts left AND he hasn't found his number
while prisoner_i.attempts < size/2 && !prisoner_i.found
let mut found = false;
for _j in 0..(size/2)
{
// count attempt
prisoner_i.attempts += 1;
// if the number inside the box is his number
if boxes[next_box] == i
{
// assign `found` to true
prisoner_i.found = true;
found = true;
break;
}
else
{
// if not found set the next_box to the number contained in the current box
next_box = boxes[next_box] as usize;
}
}
// add prisoner to list of prisoners in experiment
prisoners.push(prisoner_i);
if !found
{
all_found = false;
}
}
if !opts.json
// print result
if all_found
{
// if any prisoner has not found their number
if prisoners.iter().any(|i| !i.found)
{
println!("failure");
println!("All prisoners found their numbers!");
}
else
{
println!("success");
}
}
else
{
// export data to JSON format
let out_json = json!({
"prisoners": prisoners
});
println!("{}", out_json);
println!("Some prisoners didn't find their numbers!");
}
}