initial

.gitignore

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+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "sum"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "sum"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

src/main.rs

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+use std::io::{self, BufRead};
+
+fn main() {
+    let stdin = io::stdin();
+    let sum: u32 = stdin
+        .lock()
+        .lines()
+        .map(|line| -> u32 {
+            let num: u32 = line.unwrap().parse().unwrap_or(0);
+            num
+        }).sum();
+        
+        println!("{}", sum);
+}