#571086 (Rust) No.1265 Balloon Survival

• 問題: No.1265 Balloon Survival
• ユーザー: Moss_Local
• 提出日時: 2020-10-24 06:24:01
• 言語: Rust (1.83.0 + proconio)
• 結果: AC
• 実行時間: 65 ms / 2,000 ms
• コード長: 4,691 bytes
• コンパイル時間: 13,066 ms
• コンパイル使用メモリ: 392,052 KB
• 実行使用メモリ: 19,096 KB
• 最終ジャッジ日時: 2024-07-21 14:55:29
• 合計ジャッジ時間: 13,988 ms
• ジャッジサーバーID （参考情報）: judge3 / judge4

ファイルパターン	結果
sample	AC * 4
other	AC * 32

コンパイルメッセージ

warning: unnecessary parentheses around type
  --> src/main.rs:33:15
   |
33 | fn readi() -> (i64) {
   |               ^   ^
   |
   = note: `#[warn(unused_parens)]` on by default
help: remove these parentheses
   |
33 - fn readi() -> (i64) {
33 + fn readi() -> i64 {
   |

warning: unused variable: `p`
   --> src/main.rs:134:13
    |
134 |     let mut p = (0 as f64, 0 as f64);
    |             ^ help: if this is intentional, prefix it with an underscore: `_p`
    |
    = note: `#[warn(unused_variables)]` on by default

warning: variable does not need to be mutable
   --> src/main.rs:134:9
    |
134 |     let mut p = (0 as f64, 0 as f64);
    |         ----^
    |         |
    |         help: remove this `mut`
    |
    = note: `#[warn(unused_mut)]` on by default

warning: variable does not need to be mutable
   --> src/main.rs:136:14
    |
136 |         let (mut a, mut b) = readii();
    |              ----^
    |              |
    |              help: remove this `mut`

warning: variable does not need to be mutable
   --> src/main.rs:136:21
    |
136 |         let (mut a, mut b) = readii();
    |                     ----^
    |                     |
    |                     help: remove this `mut`

warning: variable does not need to be mutable
   --> src/main.rs:146:17
    |
146 |             let mut d = (vec[i].2 - vec[j].2) * (vec[i].2 - vec[j].2)
    |                 ----^
    |                 |
    |                 help: remove this `mut`

ソースコード

// -*- coding:utf-8-unix -*-

#![allow(dead_code)]
#![allow(unused_imports)]

use std::cmp::*;
use std::collections::*;
use std::fs::File;
use std::io::prelude::*;
use std::io::*;
use std::mem;
use std::str;
use std::vec;

const INF: i64 = 1223372036854775807;
const MEM_SIZE: usize = 202020;
const MOD: i64 = 1000000007;
// const MOD: i64 = 998244353;

use std::cmp::*;
use std::collections::*;
use std::io::stdin;
use std::io::stdout;
use std::io::Write;
#[allow(dead_code)]
fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

#[allow(dead_code)]
fn readi() -> (i64) {
    let mut str = String::new();
    let _ = stdin().read_line(&mut str).unwrap();
    let mut iter = str.split_whitespace();
    iter.next().unwrap().parse::<i64>().unwrap()
}

#[allow(dead_code)]
fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    read::<String>()
        .split_whitespace()
        .map(|e| e.parse().ok().unwrap())
        .collect()
}
#[allow(dead_code)]
fn read_vec2<T: std::str::FromStr>(n: u32) -> Vec<Vec<T>> {
    (0..n).map(|_| read_vec()).collect()
}

#[allow(dead_code)]
fn readii() -> (i64, i64) {
    let mut str = String::new();
    let _ = stdin().read_line(&mut str).unwrap();
    let mut iter = str.split_whitespace();
    (
        iter.next().unwrap().parse::<i64>().unwrap(),
        iter.next().unwrap().parse::<i64>().unwrap(),
    )
}

fn readff() -> (f64, f64) {
    let mut str = String::new();
    let _ = stdin().read_line(&mut str).unwrap();
    let mut iter = str.split_whitespace();
    (
        iter.next().unwrap().parse::<f64>().unwrap(),
        iter.next().unwrap().parse::<f64>().unwrap(),
    )
}

#[allow(dead_code)]
fn readiii() -> (i64, i64, i64) {
    let mut str = String::new();
    let _ = stdin().read_line(&mut str).unwrap();
    let mut iter = str.split_whitespace();
    (
        iter.next().unwrap().parse::<i64>().unwrap(),
        iter.next().unwrap().parse::<i64>().unwrap(),
        iter.next().unwrap().parse::<i64>().unwrap(),
    )
}
#[allow(dead_code)]
fn readuu() -> (usize, usize) {
    let mut str = String::new();
    let _ = stdin().read_line(&mut str).unwrap();
    let mut iter = str.split_whitespace();
    (
        iter.next().unwrap().parse::<usize>().unwrap(),
        iter.next().unwrap().parse::<usize>().unwrap(),
    )
}

fn readcc() -> (char, char) {
    let mut str = String::new();
    let _ = stdin().read_line(&mut str).unwrap();
    let mut iter = str.split_whitespace();
    (
        iter.next().unwrap().parse::<char>().unwrap(),
        iter.next().unwrap().parse::<char>().unwrap(),
    )
}

#[allow(dead_code)]
fn readuuu() -> (usize, usize, usize) {
    let mut str = String::new();
    let _ = stdin().read_line(&mut str).unwrap();
    let mut iter = str.split_whitespace();
    (
        iter.next().unwrap().parse::<usize>().unwrap(),
        iter.next().unwrap().parse::<usize>().unwrap(),
        iter.next().unwrap().parse::<usize>().unwrap(),
    )
}

#[allow(dead_code)]
fn readuuuu() -> (usize, usize, usize, usize) {
    let mut str = String::new();
    let _ = stdin().read_line(&mut str).unwrap();
    let mut iter = str.split_whitespace();
    (
        iter.next().unwrap().parse::<usize>().unwrap(),
        iter.next().unwrap().parse::<usize>().unwrap(),
        iter.next().unwrap().parse::<usize>().unwrap(),
        iter.next().unwrap().parse::<usize>().unwrap(),
    )
}

fn solve() {
    let n: usize = read();
    let mut v = vec![(0 as i64, 0 as usize, 0 as usize); 0];
    let mut vec = vec![(0 as i64, 0 as i64, 0 as i64); n];
    let mut p = (0 as f64, 0 as f64);
    for i in 0..n {
        let (mut a, mut b) = readii();
        // let a = a as i32;
        vec[i].1 = a;
        vec[i].2 = b;
    }
    for i in 0..n {
        for j in i + 1..n {
            if i == j {
                continue;
            }
            let mut d = (vec[i].2 - vec[j].2) * (vec[i].2 - vec[j].2)
                + (vec[i].1 - vec[j].1) * (vec[i].1 - vec[j].1);
            // d = d.sqrt();
            // vec[i].0 = d;
            v.push((d, i, j));
        }
    }
    v.sort_by(|a, b| a.0.partial_cmp(&b.0).unwrap());
    // println!("{:?}", v);
    let mut res = 0 as usize;
    let mut used = vec![0; n];
    for i in 0..v.len() {
        let p = v[i];
        if used[p.1] == 1 || used[p.2] == 1 {
            continue;
        }
        if p.1 == 0 {
            res += 1;
            used[p.2] = 1;
        } else {
            used[p.1] = 1;
            used[p.2] = 1;
        }
        // println!("{:?}", used);
    }
    println!("{:?}", res);

    return;
}

fn main() {
    solve()
}