Problem:
Score : 300 points

Problem Statement

Given is a permutation P_1, \ldots, P_N of 1, \ldots, N.
Find the number of integers i (1 \leq i \leq N) that satisfy the following condition:

For any integer j (1 \leq j \leq i), P_i \leq P_j.

Constraints

1 \leq N \leq 2 \times 10^5

P_1, \ldots, P_N is a permutation of 1, \ldots, N.

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N
P_1 ... P_N

Output

Print the number of integers i that satisfy the condition.

Sample Input 1

5
4 2 5 1 3

Sample Output 1

3

i=1, 2, and 4 satisfy the condition, but i=3 does not - for example, P_i > P_j holds for j = 1.

Similarly, i=5 does not satisfy the condition, either. Thus, there are three integers that satisfy the condition.

Sample Input 2

4
4 3 2 1

Sample Output 2

4

All integers i (1 \leq i \leq N) satisfy the condition.

Sample Input 3

6
1 2 3 4 5 6

Sample Output 3

1

Only i=1 satisfies the condition.

Sample Input 4

8
5 7 4 2 6 8 1 3

Sample Output 4

4

Sample Input 5

1
1

Sample Output 5

1

Solution in Rust (1.15.1) (judge verdict: Runtime Error)

fn main() {
  let mut un_use = String::new();
  let mut input = String::new();
  std::io::stdin().read_line(&mut un_use).ok();
  std::io::stdin().read_line(&mut input).ok();
  let numbers = input.trim().split_whitespace().map(|e| e.parse::<u8>().unwrap()).collect::<Vec<u8>>();
  let len = numbers.len();
  let mut ok_cnt = 0;
  for i in 0..len {
    let mut is_valid = true;
    for j in 0..i {
      if !(numbers[i] <= numbers[j]) {
        is_valid = false;
        break;
      }
    }
    if is_valid {
      ok_cnt += 1;
    }
  }
  println!("{}", ok_cnt);
}