arc127 a

arc127/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "arc127"
+version = "0.1.0"
+edition = "2018"
+
+# dependencies added to new project
+[dependencies]
+num = "=0.2.1"
+proconio = { version = "=0.3.6", features = ["derive"] }
+superslice = "=1.0.0"
+
+[profile.release]
+lto = true
+panic = 'abort'

arc127/rust-toolchain

@@ -0,0 +1 @@
+1.42.0

arc127/src/bin/a.rs

@@ -0,0 +1,25 @@
+use proconio::input;
+
+fn main() {
+    input! {
+        n: usize,
+    };
+    let mut ans = 0_usize;
+    for l in 1.. {
+        let mut b = 0_usize;
+        for j in 0..l {
+            b += 10_usize.pow(j as u32);
+        }
+        if b > n {
+            break;
+        }
+
+        let mut t = b + 1;
+        while b <= n {
+            ans += n.min(t - 1) + 1 - b;
+            b *= 10;
+            t *= 10;
+        }
+    }
+    println!("{}", ans);
+}

arc127/src/bin/b.rs

@@ -0,0 +1,10 @@
+use proconio::{input, marker::Usize1};
+
+fn main() {
+    input! {
+        n: usize,
+        a: [Usize1; n],
+    };
+    let ans = n - a.len();
+    println!("{}", ans);
+}

arc127/src/bin/c.rs

@@ -0,0 +1,10 @@
+use proconio::{input, marker::Usize1};
+
+fn main() {
+    input! {
+        n: usize,
+        a: [Usize1; n],
+    };
+    let ans = n - a.len();
+    println!("{}", ans);
+}

arc127/src/bin/d.rs

@@ -0,0 +1,10 @@
+use proconio::{input, marker::Usize1};
+
+fn main() {
+    input! {
+        n: usize,
+        a: [Usize1; n],
+    };
+    let ans = n - a.len();
+    println!("{}", ans);
+}

arc127/src/bin/e.rs

@@ -0,0 +1,10 @@
+use proconio::{input, marker::Usize1};
+
+fn main() {
+    input! {
+        n: usize,
+        a: [Usize1; n],
+    };
+    let ans = n - a.len();
+    println!("{}", ans);
+}

arc127/src/bin/f.rs

@@ -0,0 +1,10 @@
+use proconio::{input, marker::Usize1};
+
+fn main() {
+    input! {
+        n: usize,
+        a: [Usize1; n],
+    };
+    let ans = n - a.len();
+    println!("{}", ans);
+}