Problem:
Score : 600 points

Problem Statement

In Dwango Co., Ltd., there is a content distribution system named 'Dwango Media Cluster', and it is called 'DMC' for short.

The name 'DMC' sounds cool for Niwango-kun, so he starts to define DMC-ness of a string.

Given a string S of length N and an integer k (k \geq 3),
he defines the k-DMC number of S as the number of triples (a, b, c) of integers that satisfy the following conditions:

0 \leq a < b < c \leq N - 1

S[a] = D

S[b] = M

S[c] = C

c-a < k

Here S[a] is the a-th character of the string S. Indexing is zero-based, that is, 0 \leq a \leq N - 1 holds.

For a string S and Q integers k_0, k_1, ..., k_{Q-1}, calculate the k_i-DMC number of S for each i (0 \leq i \leq Q-1).

Constraints

3 \leq N \leq 10^6

S consists of uppercase English letters

1 \leq Q \leq 75

3 \leq k_i \leq N

All numbers given in input are integers

Input

Input is given from Standard Input in the following format:

N
S
Q
k_{0} k_{1} ... k_{Q-1}

Output

Print Q lines.
The i-th line should contain the k_i-DMC number of the string S.

Sample Input 1

18
DWANGOMEDIACLUSTER
1
18

Sample Output 1

1

(a,b,c) = (0, 6, 11) satisfies the conditions.

Strangely, Dwango Media Cluster does not have so much DMC-ness by his definition.

Sample Input 2

18
DDDDDDMMMMMCCCCCCC
1
18

Sample Output 2

210

The number of triples can be calculated as 6\times 5\times 7.

Sample Input 3

54
DIALUPWIDEAREANETWORKGAMINGOPERATIONCORPORATIONLIMITED
3
20 30 40

Sample Output 3

0
1
2

(a, b, c) = (0, 23, 36), (8, 23, 36) satisfy the conditions except the last one, namely, c-a < k_i.

By the way, DWANGO is an acronym for "Dial-up Wide Area Network Gaming Operation".

Sample Output 4

30
DMCDMCDMCDMCDMCDMCDMCDMCDMCDMC
4
5 10 15 20

Sample Output 4

10
52
110
140

Solution in Rust (1.15.1) (judge verdict: Accepted)

#[allow(unused_imports)]
use std::cmp::{min,max};
#[allow(unused_imports)]
use std::collections::{BTreeMap,BTreeSet};
#[allow(unused_imports)]
use std::ops::*;
#[allow(unused_imports)]
use std::collections::BinaryHeap;

#[allow(unused_macros)]
macro_rules! ite {
    ($c:expr, $t:expr, $f:expr) => {{
        if $c { $t } else { $f }
    }};
}

// ref: tanakh <https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8>
// diff: using Parser
#[macro_export]
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut parser = Parser::from_str($s);
        input_inner!{parser, $($r)*}
    };
    (parser = $parser:ident, $($r:tt)*) => {
        input_inner!{$parser, $($r)*}
    };
    (new_stdin_parser = $parser:ident, $($r:tt)*) => {
        let stdin = std::io::stdin();
        let reader = std::io::BufReader::new(stdin.lock());
        let mut $parser = Parser::new(reader);
        input_inner!{$parser, $($r)*}
    };
    ($($r:tt)*) => {
        input!{new_stdin_parser = parser, $($r)*}
    };
}

#[macro_export]
macro_rules! input_inner {
    ($parser:ident) => {};
    ($parser:ident, ) => {};
    ($parser:ident, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($parser, $t);
        input_inner!{$parser $($r)*}
    };
}

#[macro_export]
macro_rules! read_value {
    ($parser:ident, ( $($t:tt),* )) => {
        ( $(read_value!($parser, $t)),* )
    };
    ($parser:ident, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($parser, $t)).collect::<Vec<_>>()
    };
    ($parser:ident, chars) => {
        read_value!($parser, String).chars().collect::<Vec<char>>()
    };
    ($parser:ident, usize1) => {
        read_value!($parser, usize) - 1
    };
    ($parser:ident, $t:ty) => {
        $parser.next::<$t>().expect("Parse error")
    };
}

#[derive(Debug)]
struct BIT<T> {
    xs: Vec<T>,
    n: usize,
}

// 0-indexed
impl<T:Add<T,Output=T>+Sub<T,Output=T>+Default+Clone+Copy> BIT<T> {
    fn new(n: usize) -> BIT<T> {
        let mut m = 1;
        while m <= n {
            m *= 2;
        }
        let n = m;
        BIT::<T> {
            xs: vec![T::default(); n+1],
            n: n
        }
    }
    fn sum(&self, i: usize) -> T {
        let mut i = i + 1;
        let mut res = T::default();
        while i > 0 {
            res = res + self.xs[i];
            i -= ((i as i64) & (-(i as i64))) as usize;
            //i = i - (1usize << i.trailing_zeros());
        }
        res
    }
    fn range_sum(&self, l: usize, r: usize) -> T {
        if l < r {
            self.sum(r) - self.sum(l)
        }
        else {
            T::default()
        }
    }
    fn add(&mut self, i: usize, x: T) {
        let mut i = i + 1;
        while i <= self.n {
            self.xs[i] = self.xs[i] + x;
            //i = i + (1usize << i.trailing_zeros());
            i += ((i as i64) & (-(i as i64))) as usize;
        }
    }
}

fn main() {
    input! {
        n: usize,
        s: chars,
        nq: usize,
        qs: [usize; nq],
    }
    /*
    let mut c_count = BIT::<i64>::new(2*n);
    for i in 0..n {
        if s[i] == 'C' {
            c_count.add(i, 1);
        }
    }
    */

    let mut c_count = vec![0; 2*n];
    for i in 0..n {
        c_count[i+1] = c_count[i] + ite!(s[i] == 'C', 1, 0);
    }
    for i in n..2*n {
        c_count[i] = c_count[n];
    }
    let mut m_count = vec![0; 2*n];
    for i in 0..n {
        m_count[i+1] = m_count[i] + ite!(s[i] == 'M', 1, 0);
    }
    for i in n..2*n {
        m_count[i] = m_count[n];
    }
    /*
    let mut m_count = BIT::<i64>::new(2*n);
    for i in 0..n {
        if s[i] == 'M' {
            m_count.add(i, 1);
        }
    }
    */
    let mut mc_count = BIT::<i64>::new(2*n);
    let mut m_total = 0;
    for i in 0..n {
        if s[i] == 'M' {
            m_total += 1;
        }
        if s[i] == 'C' {
            mc_count.add(i, m_total);
        }
    }
    for i in 0..n {
    }
    let mut res = vec![0; nq];
    for left in 0..n {
        for i in 0..nq {
            let q = qs[i];
            if s[left] == 'D' {
                res[i] += mc_count.range_sum(left, left + q - 1);
                //res[i] -= m_count[left] * c_count.range_sum(left, left + q - 1);
                res[i] -= m_count[left] * (c_count[left + q - 1 + 1] - c_count[left]);
            }
        }
    }
    for &r in &res {
        println!("{}", r);
    }
}

use std::io::BufRead;
use std::io;
use std::str;

// ref: tatsuya6502 <https://qiita.com/tatsuya6502/items/cd448486f7ef7b5b8c7e>
// ref: wariuni <https://qiita.com/tatsuya6502/items/cd448486f7ef7b5b8c7e#comment-7040a5ae96305e884eb9>
// diff: using std::io::BufRead::fill_buf()
pub struct Parser<R> {
    reader: R,
    buf: Vec<u8>,
    pos: usize,
}

impl Parser<io::Empty> {
    pub fn from_str(s: &str) -> Parser<io::Empty> {
        Parser {
            reader: io::empty(),
            buf: s.as_bytes().to_vec(),
            pos: 0,
        }
    }
}

impl<R:BufRead> Parser<R> {
    pub fn new(reader: R) -> Parser<R> {
        Parser {
            reader: reader,
            buf: vec![],
            pos: 0,
        }
    }
    pub fn update_buf(&mut self) {
        self.buf.clear();
        self.pos = 0;
        loop {
            let (len,complete) = {
                let buf2 = self.reader.fill_buf().unwrap();
                self.buf.extend_from_slice(buf2);
                let len = buf2.len();
                (len, buf2[len-1] <= 0x20)
            };
            self.reader.consume(len);
            if complete {
                break;
            }
        }
    }
    pub fn next<T:str::FromStr>(&mut self) -> Result<T, T::Err> {
        loop {
            let mut begin = self.pos;
            while begin < self.buf.len() && (self.buf[begin] <= 0x20) {
                begin += 1;
            }
            let mut end = begin;
            while end < self.buf.len() && (self.buf[end] > 0x20) {
                end += 1;
            }
            if begin != self.buf.len() {
                self.pos = end;
                return str::from_utf8(&self.buf[begin..end]).unwrap().parse::<T>();
            }
            else {
                self.update_buf();
            }
        }
    }
}

use std::fmt::Display;
#[allow(dead_code)]
fn write_vec<T: Display>(xs: &Vec<T>) {
    if xs.len() == 0 {
        println!();
        return;
    }
    print!("{}", xs[0]);
    for i in 1..xs.len() {
        print!(" {}", xs[i]);
    }
    println!();
}