Solve B in arc122

Author: k-yomo

atcoder/rust/arc122/Cargo.lock

@@ -0,0 +1,80 @@
+[package]
+name = "arc122"
+version = "0.1.0"
+authors = ["k-yomo <kanji.yy@gmail.com>"]
+edition = "2018"
+
+[package.metadata.cargo-compete]
+config = "../compete.toml"
+
+[package.metadata.cargo-compete.bin]
+a = { name = "arc122-a", problem = { platform = "atcoder", contest = "arc122", index = "A", url = "https://atcoder.jp/contests/arc122/tasks/arc122_a" } }
+b = { name = "arc122-b", problem = { platform = "atcoder", contest = "arc122", index = "B", url = "https://atcoder.jp/contests/arc122/tasks/arc122_b" } }
+c = { name = "arc122-c", problem = { platform = "atcoder", contest = "arc122", index = "C", url = "https://atcoder.jp/contests/arc122/tasks/arc122_c" } }
+d = { name = "arc122-d", problem = { platform = "atcoder", contest = "arc122", index = "D", url = "https://atcoder.jp/contests/arc122/tasks/arc122_d" } }
+e = { name = "arc122-e", problem = { platform = "atcoder", contest = "arc122", index = "E", url = "https://atcoder.jp/contests/arc122/tasks/arc122_e" } }
+f = { name = "arc122-f", problem = { platform = "atcoder", contest = "arc122", index = "F", url = "https://atcoder.jp/contests/arc122/tasks/arc122_f" } }
+
+[[bin]]
+name = "arc122-a"
+path = "src/bin/a.rs"
+
+[[bin]]
+name = "arc122-b"
+path = "src/bin/b.rs"
+
+[[bin]]
+name = "arc122-c"
+path = "src/bin/c.rs"
+
+[[bin]]
+name = "arc122-d"
+path = "src/bin/d.rs"
+
+[[bin]]
+name = "arc122-e"
+path = "src/bin/e.rs"
+
+[[bin]]
+name = "arc122-f"
+path = "src/bin/f.rs"
+[dependencies]
+num = "=0.2.1"
+num-bigint = "=0.2.6"
+num-complex = "=0.2.4"
+num-integer = "=0.1.42"
+num-iter = "=0.1.40"
+num-rational = "=0.2.4"
+num-traits = "=0.2.11"
+num-derive = "=0.3.0"
+ndarray = "=0.13.0"
+nalgebra = "=0.20.0"
+alga = "=0.9.3"
+libm = "=0.2.1"
+rand = { version = "=0.7.3", features = ["small_rng"] }
+getrandom = "=0.1.14"
+rand_chacha = "=0.2.2"
+rand_core = "=0.5.1"
+rand_hc = "=0.2.0"
+rand_pcg = "=0.2.1"
+rand_distr = "=0.2.2"
+petgraph = "=0.5.0"
+indexmap = "=1.3.2"
+regex = "=1.3.6"
+lazy_static = "=1.4.0"
+ordered-float = "=1.0.2"
+ascii = "=1.0.0"
+permutohedron = "=0.2.4"
+superslice = "=1.0.0"
+itertools = "=0.9.0"
+itertools-num = "=0.1.3"
+maplit = "=1.0.2"
+either = "=1.5.3"
+im-rc = "=14.3.0"
+fixedbitset = "=0.2.0"
+bitset-fixed = "=0.1.0"
+proconio = { version = "=0.3.6", features = ["derive"] }
+text_io = "=0.1.8"
+whiteread = "=0.5.0"
+rustc-hash = "=1.1.0"
+smallvec = "=1.2.0"

atcoder/rust/arc122/Cargo.toml

@@ -0,0 +1,19 @@
+#![allow(unused_imports)]
+
+use std::cmp::*;
+use std::collections::*;
+use std::io::Write;
+use std::ops::Bound::*;
+
+use itertools::*;
+use itertools::__std_iter::once;
+use itertools_num::ItertoolsNum;
+use proconio::*;
+use proconio::marker::*;
+use superslice::*;
+
+fn main() {
+    input! {
+
+    }
+}

atcoder/rust/arc122/src/bin/a.rs

@@ -0,0 +1,40 @@
+#![allow(unused_imports)]
+
+use std::cmp::*;
+use std::collections::*;
+use std::io::Write;
+use std::ops::Bound::*;
+
+use itertools::*;
+use itertools::__std_iter::once;
+use itertools_num::ItertoolsNum;
+use proconio::*;
+use proconio::marker::*;
+use superslice::*;
+
+fn main() {
+    input! {
+        n: usize,
+        a: [f64; n],
+    }
+
+    let mut l = 0.0;
+    let mut r = 1000000000.0;
+    while (r - l) > 0.000001 {
+        let ml = l + (r - l) / 3.0;
+        let mr = r - (r - l) / 3.0;
+        let ml_score = calc_score(&a, ml);
+        let mr_score = calc_score(&a, mr);
+        if ml_score > mr_score {
+            l = ml;
+        } else {
+            r = mr;
+        }
+    }
+
+    println!("{}", calc_score(&a, l))
+}
+
+fn calc_score(a: &Vec<f64>, x: f64) -> f64 {
+    return a.iter().map(|&ai| x + ai - if ai > 2.0 * x { 2.0 * x } else { ai }).sum::<f64>() / a.len() as f64;
+}

atcoder/rust/arc122/src/bin/b.rs

@@ -0,0 +1,19 @@
+#![allow(unused_imports)]
+
+use std::cmp::*;
+use std::collections::*;
+use std::io::Write;
+use std::ops::Bound::*;
+
+use itertools::*;
+use itertools::__std_iter::once;
+use itertools_num::ItertoolsNum;
+use proconio::*;
+use proconio::marker::*;
+use superslice::*;
+
+fn main() {
+    input! {
+
+    }
+}

atcoder/rust/arc122/src/bin/c.rs

@@ -0,0 +1,19 @@
+#![allow(unused_imports)]
+
+use std::cmp::*;
+use std::collections::*;
+use std::io::Write;
+use std::ops::Bound::*;
+
+use itertools::*;
+use itertools::__std_iter::once;
+use itertools_num::ItertoolsNum;
+use proconio::*;
+use proconio::marker::*;
+use superslice::*;
+
+fn main() {
+    input! {
+
+    }
+}

atcoder/rust/arc122/src/bin/d.rs

@@ -0,0 +1,19 @@
+#![allow(unused_imports)]
+
+use std::cmp::*;
+use std::collections::*;
+use std::io::Write;
+use std::ops::Bound::*;
+
+use itertools::*;
+use itertools::__std_iter::once;
+use itertools_num::ItertoolsNum;
+use proconio::*;
+use proconio::marker::*;
+use superslice::*;
+
+fn main() {
+    input! {
+
+    }
+}

atcoder/rust/arc122/src/bin/e.rs

@@ -0,0 +1,19 @@
+#![allow(unused_imports)]
+
+use std::cmp::*;
+use std::collections::*;
+use std::io::Write;
+use std::ops::Bound::*;
+
+use itertools::*;
+use itertools::__std_iter::once;
+use itertools_num::ItertoolsNum;
+use proconio::*;
+use proconio::marker::*;
+use superslice::*;
+
+fn main() {
+    input! {
+
+    }
+}

atcoder/rust/arc122/src/bin/f.rs

@@ -0,0 +1,26 @@
+---
+type: Batch
+timelimit: 2s
+match: Lines
+
+cases:
+  - name: sample1
+    in: |
+      3
+      3 1 5
+    out: |
+      15
+  - name: sample2
+    in: |
+      4
+      1 1 1 1
+    out: |
+      10
+  - name: sample3
+    in: |
+      10
+      866111664 178537096 844917655 218662351 383133839 231371336 353498483 865935868 472381277 579910117
+    out: |
+      279919144
+
+extend: []

atcoder/rust/arc122/testcases/a.yml

@@ -0,0 +1,23 @@
+---
+type: Batch
+timelimit: 2s
+match:
+  Float:
+    relative_error: 0.000001
+    absolute_error: 0.000001
+
+cases:
+  - name: sample1
+    in: |
+      3
+      3 1 4
+    out: |
+      1.83333333333333333333
+  - name: sample2
+    in: |
+      10
+      866111664 178537096 844917655 218662351 383133839 231371336 353498483 865935868 472381277 579910117
+    out: |
+      362925658.10000000000000000000
+
+extend: []