abc053 a, b, c, d

cargo-atcoder-1.70.0/contests/abc053/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "abc053"
+version = "0.1.0"
+edition = "2021"
+
+# dependencies added to new project
+[dependencies]
+ac-library-rs = "=0.1.1"
+num = "=0.4.0"
+proconio = { version = "=0.4.3", features = ["derive"] }
+superslice = "=1.0.0"
+
+[profile.release]
+lto = true
+panic = 'abort'

cargo-atcoder-1.70.0/contests/abc053/rust-toolchain

@@ -0,0 +1 @@
+1.70.0

cargo-atcoder-1.70.0/contests/abc053/src/bin/a.rs

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+use proconio::input;
+
+fn main() {
+    input! {
+        x: usize,
+    }
+    let ans = if x < 1200 { "ABC" } else { "ARC" };
+    println!("{}", ans);
+}

cargo-atcoder-1.70.0/contests/abc053/src/bin/b.rs

@@ -0,0 +1,11 @@
+use proconio::{input, marker::Chars};
+
+fn main() {
+    input! {
+        s: Chars,
+    }
+    let l = s.iter().copied().position(|s_i| s_i == 'A').unwrap();
+    let r = s.iter().copied().rposition(|s_j| s_j == 'Z').unwrap();
+    let ans = r - l + 1;
+    println!("{}", ans);
+}

cargo-atcoder-1.70.0/contests/abc053/src/bin/c.rs

@@ -0,0 +1,15 @@
+use proconio::input;
+
+fn main() {
+    input! {
+        x: usize,
+    };
+    let ans = x / 11 * 2
+        + match x % 11 {
+            0 => 0,
+            1..=6 => 1,
+            7..=10 => 2,
+            _ => unreachable!(),
+        };
+    println!("{}", ans);
+}

cargo-atcoder-1.70.0/contests/abc053/src/bin/d.rs

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+use std::collections::HashSet;
+
+use proconio::input;
+
+fn main() {
+    input! {
+        n: usize,
+        a: [usize; n],
+    };
+    let count = a.iter().copied().collect::<HashSet<_>>().len();
+    let ans = if count % 2 == 0 { count - 1 } else { count };
+    println!("{}", ans);
+}