feat(solutions): add cakes-swerc-2020-2021/rust/function

challenges/cakes-swerc-2020-2021/README.md

@@ -15,8 +15,8 @@ make?
 
 ### Input
 
-- **Line 1:** Single integer `N` for the number of ingredients
+- **Line 1:** Single integer `N` for the number of ingredients.
-- **`n` next lines:**, One for each ingredient. Each of these lines contains two positive integers:
+- **`N` next lines:** One for each ingredient. Each of these lines contains two positive integers:
 the first one is the required quantity of this ingredient per cake, the second one is the quantity of
 this ingredient you have in your kitchen.
 

challenges/cakes-swerc-2020-2021/solutions/rust/function/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "rust_application"
+version = "1.0.0"

challenges/cakes-swerc-2020-2021/solutions/rust/function/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "rust_application"
+version = "1.0.0"
+edition = "2021"
+
+[dependencies]

challenges/cakes-swerc-2020-2021/solutions/rust/function/README.md

@@ -0,0 +1,3 @@
+# cakes-swerc-2020-2021/rust/function
+
+Created by [@Divlo](https://github.com/Divlo) on 4 January 2023.

challenges/cakes-swerc-2020-2021/solutions/rust/function/src/main.rs

@@ -0,0 +1,46 @@
+use std::io;
+
+fn main() {
+    let mut number_of_ingredients = String::new();
+    io::stdin()
+        .read_line(&mut number_of_ingredients)
+        .expect("Failed to read `stdin` line.");
+    let number_of_ingredients: usize = number_of_ingredients
+        .trim()
+        .parse()
+        .expect("Failed to convert `number_of_ingredients` as an `usize`.");
+
+    let mut maximum_number_of_cake_possible: Option<u32> = None;
+
+    for _ in 0..number_of_ingredients {
+        let mut line = String::new();
+        io::stdin()
+            .read_line(&mut line)
+            .expect("Failed to read `stdin` line.");
+        let line_integers: Vec<&str> = line.trim().split_whitespace().collect();
+        let quantity_per_cake: u32 = line_integers
+            .get(0)
+            .expect("Couldn't get `quantity_per_cake`.")
+            .parse()
+            .unwrap();
+        let quantity_available: u32 = line_integers
+            .get(1)
+            .expect("Couldn't get `quantity_available`.")
+            .parse()
+            .unwrap();
+
+        let cake_possible = quantity_available / quantity_per_cake;
+        if let Some(value) = maximum_number_of_cake_possible {
+            if cake_possible < value {
+                maximum_number_of_cake_possible = Some(cake_possible);
+            }
+        } else {
+            maximum_number_of_cake_possible = Some(cake_possible);
+        }
+    }
+    if let Some(value) = maximum_number_of_cake_possible {
+        println!("{value}");
+    } else {
+        println!("0");
+    }
+}