Problem:
Score : 300 points

Problem Statement

Takahashi participated in a contest on AtCoder.

The contest had N problems.

Takahashi made M submissions during the contest.

The i-th submission was made for the p_i-th problem and received the verdict S_i (AC or WA).

The number of Takahashi's correct answers is the number of problems on which he received an AC once or more.

The number of Takahashi's penalties is the sum of the following count for the problems on which he received an AC once or more: the number of WAs received before receiving an AC for the first time on that problem.

Find the numbers of Takahashi's correct answers and penalties.

Constraints

N, M, and p_i are integers.

1 \leq N \leq 10^5

0 \leq M \leq 10^5

1 \leq p_i \leq N

S_i is AC or WA.

Input

Input is given from Standard Input in the following format:

N M
p_1 S_1
:
p_M S_M

Output

Print the number of Takahashi's correct answers and the number of Takahashi's penalties.

Sample Input 1

2 5
1 WA
1 AC
2 WA
2 AC
2 WA

Sample Output 1

2 2

In his second submission, he received an AC on the first problem for the first time. Before this, he received one WA on this problem.

In his fourth submission, he received an AC on the second problem for the first time. Before this, he received one WA on this problem.

Thus, he has two correct answers and two penalties.

Sample Input 2

100000 3
7777 AC
7777 AC
7777 AC

Sample Output 2

1 0

Note that it is pointless to get an AC more than once on the same problem.

Sample Input 3

6 0

Sample Output 3

0 0

Solution in Rust (1.15.1) (judge verdict: Wrong Answer)

macro_rules! input {
  (source = $s:expr, $($r:tt)*) => {
      let mut iter = $s.split_whitespace();
      let mut next = || { iter.next().unwrap() };
      input_inner!{next, $($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_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)*}
  };
  ($next:expr, mut $var:ident : $t:tt $($r:tt)*) => {
      let mut $var = read_value!($next, $t);
      input_inner!{$next $($r)*}
  };
}

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, $t:ty) => {
      $next().parse::<$t>().expect("Parse error")
  };
}
use std::collections::{HashMap,HashSet,VecDeque, BinaryHeap};
use std::cmp::{max,min};

fn is_prime(x:i64) -> bool {
  if x == 2 {return true;}
  if x < 2 || x % 2 == 0 {return false;}
  let mut j = 3;
  while j <= (x as f64).sqrt() as i64 {
      if x % j == 0 {
          return false;
      }
      j += 2;
  }
  true
}



pub mod modular {
  const M: i64 = 1000000007;

  #[derive(Debug, Clone, Copy, Default, PartialOrd, Ord, PartialEq, Eq)]
  pub struct Mod(i64);

  impl ::std::fmt::Display for Mod {
      fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
          write!(f, "{}", self.0)
      }
  }

  impl Mod {
      pub fn new(v: i64) -> Mod {
          Mod(v % M)
      }

      pub fn pow(self, mut r: i64) -> Mod {
          let mut k = self;
          let mut ret = 1.into();

          while r > 0 {
              if r % 2 != 0 {
                  ret = ret * k;
              }
              r /= 2;
              k = k * k;
          }

          ret
      }

      // This requires M is prime
      pub fn recip(self) -> Mod {
          self.pow(M - 2)
      }
  }

  use std::ops::*;

  impl<T: Into<Mod>> Add<T> for Mod {
      type Output = Mod;
      fn add(self, rhs: T) -> Self::Output {
          Mod::new(self.0 + rhs.into().0)
      }
  }
  impl<T: Into<Mod>> AddAssign<T> for Mod {
      fn add_assign(&mut self, rhs: T) {
          *self = *self + rhs;
      }
  }

  impl<T: Into<Mod>> Sub<T> for Mod {
      type Output = Mod;
      fn sub(self, rhs: T) -> Self::Output {
          Mod::new(self.0 - rhs.into().0 + M)
      }
  }
  impl<T: Into<Mod>> SubAssign<T> for Mod {
      fn sub_assign(&mut self, rhs: T) {
          *self = *self - rhs;
      }
  }

  impl<T: Into<Mod>> Mul<T> for Mod {
      type Output = Mod;
      fn mul(self, rhs: T) -> Self::Output {
          Mod::new(self.0 * rhs.into().0)
      }
  }
  impl<T: Into<Mod>> MulAssign<T> for Mod {
      fn mul_assign(&mut self, rhs: T) {
          *self = *self * rhs;
      }
  }

  impl<T: Into<Mod>> Div<T> for Mod {
      type Output = Mod;
      fn div(self, rhs: T) -> Self::Output {
          self * rhs.into().recip()
      }
  }
  impl<T: Into<Mod>> DivAssign<T> for Mod {
      fn div_assign(&mut self, rhs: T) {
          *self = *self / rhs;
      }
  }

  impl Neg for Mod {
      type Output = Mod;
      fn neg(self) -> Self::Output {
          Mod(0) - self
      }
  }

  impl<T: ::std::convert::Into<i64>> ::std::convert::From<T> for Mod {
      fn from(v: T) -> Self {
          Mod::new(v.into())
      }
  }
}

type Pi = Vec<u32>;

fn calc_k(pi:&Pi, i:u32, n:u32) -> u32 {

  // pi(i) + 1 .. n
  let g0: HashSet<u32> = (pi[i as usize - 1] + 1.. n + 2).collect();
  // pi(1) .. pi(i-1)
  let g1: HashSet<u32> = pi[0 .. (i - 1) as usize].to_vec().into_iter().collect();    

  let diff = &g0 - &g1;
  match diff.into_iter().min() {
      Some(k) => k,
      _ => 0
  }   
}

fn enumlation(n: u32) -> Vec<Pi> {
  let mut pi : Pi = (1..n+1).collect();
  let mut i = n - 1;  
  let mut result :  Vec<Vec<u32>> = Vec::new();
  let mut k = calc_k(&pi, i , n);

  result.push(pi.clone());

  // k == n + 1, i == 1
  while k != n + 1 || i != 1  {
      if k <= n {
          pi[i as usize - 1] = k;
          if i == n {
              result.push(pi.clone());
          }
          if i < n  {
              pi[i as usize] = 0;
              i = i + 1;
          }
      }
      if k == n + 1 {
          i = i - 1;
      }
      k = calc_k(&pi, i , n);
  }    
  result   
}

/// Ported from [bluss/permutohedron](https://github.com/bluss/permutohedron)
pub trait LexicalPermutation {
  /// Return `true` if the slice was permuted, `false` if it is already
  /// at the last ordered permutation.
  fn next_permutation(&mut self) -> bool;
  /// Return `true` if the slice was permuted, `false` if it is already
  /// at the first ordered permutation.
  fn prev_permutation(&mut self) -> bool;
}
impl<T> LexicalPermutation for [T]
where
  T: Ord,
{
  /// Original author in Rust: Thomas Backman <serenity@exscape.org>
  fn next_permutation(&mut self) -> bool {
      if self.len() < 2 {
          return false;
      }
      let mut i = self.len() - 1;
      while i > 0 && self[i - 1] >= self[i] {
          i -= 1;
      }
      if i == 0 {
          return false;
      }
      let mut j = self.len() - 1;
      while j >= i && self[j] <= self[i - 1] {
          j -= 1;
      }
      self.swap(j, i - 1);
      self[i..].reverse();
      true
  }
  fn prev_permutation(&mut self) -> bool {
      if self.len() < 2 {
          return false;
      }
      let mut i = self.len() - 1;
      while i > 0 && self[i - 1] <= self[i] {
          i -= 1;
      }
      if i == 0 {
          return false;
      }
      self[i..].reverse();
      let mut j = self.len() - 1;
      while j >= i && self[j - 1] < self[i - 1] {
          j -= 1;
      }
      self.swap(i - 1, j);
      true
  }
}

fn main(){
  input!{
    n: usize,
    m: usize,
    mut psm: [(usize,chars); m],
  }
  let M = (1e5 + 1.)as usize;
  let mut ans = (0, 0);
  let mut ac_vec = vec![false; M];
  for i in 0..m {
    if ac_vec[psm[i].0] {
      continue;
    }
    if psm[i].1[0] == 'A' {
      ans.0 += 1;
      ac_vec[psm[i].0] = true;
    } else {
      ans.1 += 1;
    }
  }
  println!("{} {}", ans.0, ans.1);
}