#922132 (Rust) No.805 UMG

• 問題: No.805 UMG
• ユーザー: ynppp
• 提出日時: 2023-10-24 09:44:49
• 言語: Rust (1.83.0 + proconio)
• 結果: AC
• 実行時間: 1,306 ms / 2,000 ms
• コード長: 2,151 bytes
• コンパイル時間: 12,448 ms
• コンパイル使用メモリ: 401,292 KB
• 実行使用メモリ: 6,944 KB
• 最終ジャッジ日時: 2024-09-23 02:18:55
• 合計ジャッジ時間: 20,060 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 * 3
other	AC * 25

ソースコード

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#![allow(dead_code, unused_variables, unused_macros)]
fn main() {
    input!(n:usize, s:String);
    let u: Vec<_> = s.match_indices('U').map(|(i, _)| i).collect();
    let m: Vec<_> = s.match_indices('M').map(|(i, _)| i).collect();
    let g: Vec<_> = s.match_indices('G').map(|(i, _)| i).collect();
    let ans = u
        .into_iter()
        .flat_map(|u| {
            let g = &g;
            m.iter()
                .filter(move |&&m| u < m && g.contains(&(m + m - u)))
        })
        .count();
    println!("{ans}");
}
mod xxx {
    // https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
    #[macro_export]
    macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        input_inner!{$s, $($r)*}
    };
    ($($r:tt)*) => {
        let stdin = std::io::stdin();
        let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock()));
        let mut next = move || -> String{
            bytes
                .by_ref()
                .map(|r|r.unwrap() as char)
                .skip_while(|c|c.is_whitespace())
                .take_while(|c|!c.is_whitespace())
                .collect()
        };
        input_inner!{next, $($r)*}
    };
}
    #[macro_export]
    macro_rules! input_inner {
    ($next:expr) => {};
    ($next:expr, ) => {};
    ($next:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($next, $t);
        input_inner!{$next $($r)*}
    };
}
    #[macro_export]
    macro_rules! read_value {
    ($next:expr, ( $($t:tt),* )) => {
        ( $(read_value!($next, $t)),* )
    };
    ($next:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($next, $t)).collect::<Vec<_>>()
    };
    ($next:expr, chars) => {
        read_value!($next, String).chars().collect::<Vec<char>>()
    };
    ($next:expr, usize1) => {
        read_value!($next, usize) - 1
    };
    ($next:expr, bits)=>{
        u64::from_str_radix(&$next(), 2).expect("Parse error")
    };
    ($next:expr, hexs)=>{
        u64::from_str_radix(&$next(), 16).expect("Parse error")
    };
    ($next:expr, $t:ty) => {
        $next().parse::<$t>().expect("Parse error")
    };
}
}
 
 
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