There are N people standing in a row from west to east.
Each person is facing east or west.
The directions of the people is given as a string S of length N.
The i-th person from the west is facing east if S_i = E, and west if S_i = W.
You will appoint one of the N people as the leader, then command the rest of them to face in the direction of the leader.
Here, we do not care which direction the leader is facing.
The people in the row hate to change their directions, so you would like to select the leader so that the number of people who have to change their directions is minimized.
Find the minimum number of people who have to change their directions.

-----Constraints-----
 - 2 \leq N \leq 3 \times 10^5
 - |S| = N
 - S_i is E or W.

-----Input-----
Input is given from Standard Input in the following format:
N
S

-----Output-----
Print the minimum number of people who have to change their directions.

-----Sample Input-----
5
WEEWW

-----Sample Output-----
1

Assume that we appoint the third person from the west as the leader.
Then, the first person from the west needs to face east and has to turn around.
The other people do not need to change their directions, so the number of people who have to change their directions is 1 in this case.
It is not possible to have 0 people who have to change their directions, so the answer is 1.

Source: atcoder | Difficulty: EASY


Solutions:
n = int(input())
s = input()
cnt = s[1:].count('E')
ans = cnt
for i in range(1, n):
	if s[i - 1] == 'W':
		cnt += 1
	if s[i] == 'E':
		cnt -= 1
	ans = min(ans, cnt)
print(ans)


N = int(input())
S = list(input())
e_count = 0
for s in S:
	if s == 'E':
		e_count += 1
min_inv = float('infinity')
for s in S:
	if s == 'E':
		e_count -= 1
	min_inv = min(e_count, min_inv)
	if s == 'W':
		e_count += 1
print(min_inv)


n = int(input())
s = input()
W_cnt = [0]
E_cnt = [0]
for ss in s:
	w = W_cnt[-1]
	if ss == 'W':
		w += 1
	W_cnt.append(w)
for ss in reversed(s):
	e = E_cnt[-1]
	if ss == 'E':
		e += 1
	E_cnt.append(e)
E_cnt = E_cnt[::-1]
minc = float('inf')
for i in range(n):
	c = W_cnt[i] + E_cnt[i + 1]
	minc = min(minc, c)
print(minc)


N = int(input())
S = list(input())
ans_list = []
ans = S[1:].count('E')
ans_list.append(ans)
for i in range(1, N):
	if S[i - 1] == 'W':
		ans += 1
	if S[i] == 'E':
		ans -= 1
	ans_list.append(ans)
print(min(ans_list))


N = int(input())
S = input()
numE = [0] * N
numW = [0] * N
for i in range(N):
	if S[i] == 'E':
		numE[i] += 1
	else:
		numW[i] += 1
	if 0 < i:
		numE[i] += numE[i - 1]
		numW[i] += numW[i - 1]
ans = N
for i in range(N):
	if i == 0:
		val = numE[-1] - numE[i]
	elif i == N - 1:
		val = numW[i - 1]
	else:
		val = numE[-1] - numE[i] + numW[i - 1]
	ans = min(ans, val)
print(ans)


N = int(input())
S = input()
cnt = S[1:].count('E')
ans = cnt
for i in range(1, N):
	if S[i - 1] == 'W':
		cnt += 1
	if S[i] == 'E':
		cnt -= 1
	ans = min(ans, cnt)
print(ans)


n = int(input())
s = str(input())
sE = s.count('E')
sW = s.count('W')
l = []
(e, w) = (0, 0)
for ch in s:
	if ch == 'E':
		e += 1
	else:
		w += 1
	m = sE - e + w
	l.append(sE - e + w - 1 if ch == 'W' else sE - e + w)
print(min(l))


from itertools import accumulate
n = int(input())
s = [0 if i == 'E' else 1 for i in str(input())]
s_cumsum = list(accumulate(s))
s_cumsum_rev = list(accumulate(reversed(s)))
ans = 10 ** 10
for i in range(1, n - 1):
	a_1 = s_cumsum[i - 1]
	a_0 = i - a_1
	b_1 = s_cumsum_rev[-2 - i]
	b_0 = n - 1 - i - b_1
	ans = min(ans, a_1 + b_0)
ans = min(ans, s_cumsum[-2])
ans = min(ans, n - 1 - s_cumsum_rev[-2])
print(ans)


N = int(input())
S = list(input())
minCount = N
left = 0
right = S.count('E')
for n in range(0, N):
	if n != 0 and S[n - 1] == 'W':
		left += 1
	if S[n] == 'E':
		right -= 1
	if minCount > left + right:
		minCount = left + right
print(minCount)


N = int(input())
S = list(input())
sum_W = [0]
for i in range(1, N):
	if S[i - 1] == 'W':
		sum_W.append(sum_W[i - 1] + 1)
	else:
		sum_W.append(sum_W[i - 1])
sum_E = [S[1:].count('E')]
for i in range(0, N - 1):
	if S[i + 1] == 'E':
		sum_E.append(sum_E[i] - 1)
	else:
		sum_E.append(sum_E[i])
counts = []
for i in range(N):
	count = 0
	counts.append(sum_W[i] + sum_E[i])
print(min(counts))


N = int(input())
S = input()
a = S.count('E')
c = a
for s in S:
	if s == 'E':
		c -= 1
	else:
		c += 1
	a = min(a, c)
print(a)


n = int(input())
s = input()
res = n
e = s.count('E')
l_w = 0
l_e = 0
for i in range(n):
	if i == n - 1 and s[i] == 'E':
		l_e += 1
	tmp = l_w + (e - l_e)
	res = min(tmp, res)
	if s[i] == 'W':
		l_w += 1
	else:
		l_e += 1
print(res)


n = int(input())
s = str(input())
left = s[0]
ans = 10 ** 6
left = {}
left.setdefault('W', 0)
left.setdefault('E', 0)
right = {}
right.setdefault('E', 0)
right.setdefault('W', 0)
for i in range(n):
	right[s[i]] += 1
ans = 10 ** 6
for i in range(n):
	right[s[i]] -= 1
	ans = min(ans, left['W'] + right['E'])
	left[s[i]] += 1
print(ans)


import math
import sys
import os
from operator import mul
import numpy as np
sys.setrecursionlimit(10 ** 7)

def _S():
	return sys.stdin.readline().rstrip()

def I():
	return int(_S())

def LS():
	return list(_S().split())

def LI():
	return list(map(int, LS()))
if os.getenv('LOCAL'):
	inputFile = basename_without_ext = os.path.splitext(os.path.basename(__file__))[0] + '.txt'
	sys.stdin = open(inputFile, 'r')
INF = float('inf')
N = I()
S = list(_S())
ans = N
Sn = np.array(S)
S_cum = np.zeros(N + 1, dtype='int')
S_cum[1:] = np.cumsum(Sn == 'W')
Snr = np.flip(Sn, 0)
S_cumr = np.zeros(N + 1, dtype='int')
S_cumr[1:] = np.cumsum(Snr == 'E')
for i in range(N):
	attention = S_cum[i] + S_cumr[N - (i + 1)]
	ans = min(ans, attention)
print(ans)


n = int(input())
s = input()
w = [0] * n
e = [0] * n
if s[0] == 'W':
	w[0] = 1
else:
	e[0] = 1
for i in range(1, n):
	if s[i] == 'W':
		w[i] = w[i - 1] + 1
		e[i] = e[i - 1]
	else:
		w[i] = w[i - 1]
		e[i] = e[i - 1] + 1
ans = float('inf')
for i in range(n):
	t = 0
	if i != 0:
		t += w[i - 1]
	if i != n - 1:
		t += e[-1] - e[i]
	if t < ans:
		ans = t
print(ans)


import sys
sys.setrecursionlimit(10 ** 8)

def ii():
	return int(sys.stdin.readline())

def mi():
	return map(int, sys.stdin.readline().split())

def li():
	return list(map(int, sys.stdin.readline().split()))

def li2(N):
	return [list(map(int, sys.stdin.readline().split())) for _ in range(N)]

def dp2(ini, i, j):
	return [[ini] * i for _ in range(j)]
from itertools import accumulate
N = ii()
S = input()
cnt = [0] * N
for i in range(N):
	if S[i] == 'W':
		cnt[i] = 1
cnt = list(accumulate(cnt))
ans = N
for i in range(N):
	if S[i] == 'E':
		ans = min(ans, cnt[i] + (N - 1 - i) - (cnt[-1] - cnt[i]))
	else:
		ans = min(ans, i + 1 - cnt[i] + (N - 1 - i) - (cnt[-1] - cnt[i]))
print(ans)


N = int(input())
S = list(input())
(e, w) = ([0] * (N + 1), [0] * (N + 1))
for i in range(1, N + 1):
	w[i] += w[i - 1] + (1 if S[i - 1] == 'W' else 0)
	e[i] += e[i - 1] + (1 if S[i - 1] == 'E' else 0)
ans = N
for i in range(N):
	ans = min(ans, w[i] + e[-1] - e[i + 1])
print(ans)


import math
from math import gcd, pi, sqrt
INF = float('inf')
import sys
sys.setrecursionlimit(10 ** 6)
import itertools
from collections import Counter, deque

def i_input():
	return int(input())

def i_map():
	return list(map(int, input().split()))

def i_list():
	return list(i_map())

def i_row(N):
	return [i_input() for _ in range(N)]

def i_row_list(N):
	return [i_list() for _ in range(N)]

def s_input():
	return input()

def s_map():
	return input().split()

def s_list():
	return list(s_map())

def s_row(N):
	return [s_input for _ in range(N)]

def s_row_str(N):
	return [s_list() for _ in range(N)]

def s_row_list(N):
	return [list(s_input()) for _ in range(N)]

def main():
	n = i_input()
	s = input()
	ans = 0
	for i in s[1:]:
		if i == 'E':
			ans += 1
	l = [ans]
	for i in range(n - 1):
		trial = 0
		if s[i] == 'W':
			trial += 1
		if s[i + 1] == 'E':
			trial -= 1
		ans += trial
		l.append(ans)
	print(min(l))

def __starting_point():
	main()
__starting_point()


n = int(input())
s = input()
arr = []
E = s.count('E')
w = 0
e = 0
for i in range(n):
	if s[i] == 'W':
		arr.append(w + E - e)
		w += 1
	else:
		arr.append(w + E - e - 1)
		e += 1
ans = min(arr)
print(ans)


N = int(input())
S = input()
e = S.count('E')
cnt = e
for i in S:
	if i == 'E':
		cnt -= 1
	else:
		cnt += 1
	e = min(e, cnt)
print(e)


import sys
read = sys.stdin.read
readlines = sys.stdin.readlines
from itertools import accumulate

def main():
	n = int(input())
	s = list(input())
	enum = [1 if c == 'E' else 0 for c in s]
	wnum = [1 if c == 'W' else 0 for c in s]
	enuma = tuple(accumulate(enum))
	wnuma = tuple(accumulate(wnum))
	wnumm = wnuma[-1]
	wnuma2 = [wnumm - wn for wn in wnuma]
	num = max(wnuma2[0], enuma[-2])
	for i1 in range(1, n - 1):
		num = max(num, enuma[i1 - 1] + wnuma2[i1])
	r = n - num - 1
	print(r)

def __starting_point():
	main()
__starting_point()


import sys
from io import StringIO
import unittest

class TestClass(unittest.TestCase):

	def assertIO(self, input, output):
		(stdout, stdin) = (sys.stdout, sys.stdin)
		(sys.stdout, sys.stdin) = (StringIO(), StringIO(input))
		resolve()
		sys.stdout.seek(0)
		out = sys.stdout.read()[:-1]
		(sys.stdout, sys.stdin) = (stdout, stdin)
		self.assertEqual(out, output)

	def test_入力例_1(self):
		input = '5\nWEEWW'
		output = '1'
		self.assertIO(input, output)

	def test_入力例_2(self):
		input = '12\nWEWEWEEEWWWE'
		output = '4'
		self.assertIO(input, output)

	def test_入力例_3(self):
		input = '8\nWWWWWEEE'
		output = '3'
		self.assertIO(input, output)

def resolve():
	N = int(input())
	S = list(input())
	W = [0] * N
	E = [0] * N
	L = 0
	R = 0
	for i in range(N):
		if S[i] == 'W':
			L += 1
		if S[N - 1 - i] == 'E':
			R += 1
		W[i] = L
		E[N - 1 - i] = R
	ans = float('inf')
	for i in range(N):
		ans = min(ans, E[i] + W[i] - 1)
	print(ans)

def __starting_point():
	resolve()
__starting_point()


EW = 0
ans = 99999999999999999999999999999999
N = int(input())
S = input()
for i in range(N):
	if i == 0:
		pass
	elif S[i] == 'E':
		EW += 1
if ans > EW:
	ans = EW
for j in range(1, N):
	if S[j] == 'E':
		EW -= 1
	if S[j - 1] == 'W':
		EW += 1
	if ans > EW:
		ans = EW
print(ans)


n = int(input())
s = input()

def count(n, s):
	cntw = 0
	cnte = 0
	mcntw = 0
	mcnte = 0
	maxn = 0
	for i in range(n):
		if s[i] == 'W':
			cntw += 1
		else:
			cnte += 1
		if maxn < cnte - cntw:
			maxn = cnte - cntw
			mcnte = cnte
			mcntw = cntw
	if cntw == 0 or cnte == 0:
		print(0)
		return
	else:
		print(mcntw + cnte - mcnte)
		return
count(n, s)


N = int(input())
S = list(input())
ans = N
left_W = 0
right_E = S[1:].count('E')
for n in range(N):
	if n == 0:
		ans = min(ans, S[1:].count('E'))
	elif n == N - 1:
		ans = min(ans, S[:n].count('W'))
	else:
		if S[n] == 'E':
			right_E -= 1
		if S[n - 1] == 'W':
			left_W += 1
		ans = min(ans, left_W + right_E)
print(ans)


N = int(input())
S = input()
ans = S.count('E')
left = 0
right = ans
for i in S:
	if i == 'E':
		right -= 1
		ans = min(ans, right + left)
	if i == 'W':
		ans = min(ans, right + left)
		left += 1
print(ans)


N = int(input())
S = input()
num_E = [0] * N
num_W = [0] * N
max_num = 0
leader_index = 0
for (i, c) in enumerate(S):
	if c == 'W':
		num_W[i] = num_W[i - 1] + 1
		num_E[i] = num_E[i - 1]
	else:
		num_W[i] = num_W[i - 1]
		num_E[i] = num_E[i - 1] + 1
	tmp = num_E[i] - num_W[i]
	if max_num < tmp:
		leader_index = i
		max_num = tmp
print(S[:leader_index].count('W') + S[leader_index + 1:].count('E'))


n = int(input())
s = input()
l = [0] * n
r = [0] * n
for i in range(1, n):
	l[i] = l[i - 1] + (s[i - 1] == 'W')
for i in range(n - 2, -1, -1):
	r[i] = r[i + 1] + (s[i + 1] == 'E')
ans = n - 1
for i in range(n):
	ans = min(ans, l[i] + r[i])
print(ans)


n = int(input())
s = input()
l = [0] * n
r = [0] * n
ans = n
for i in range(n):
	if i == 0:
		if s[0] == 'W':
			l[0] = 1
	elif s[i] == 'W':
		l[i] = l[i - 1] + 1
	else:
		l[i] = l[i - 1]
	if i == 0:
		if s[-1] == 'E':
			r[0] = 1
	elif s[-i - 1] == 'E':
		r[i] = r[i - 1] + 1
	else:
		r[i] = r[i - 1]
for i in range(n):
	if i == 0:
		ans = min(ans, r[n - 1 - i])
	elif i == n - 1:
		ans = min(ans, l[i - 1])
	else:
		ans = min(ans, l[i - 1] + r[n - 1 - i])
print(ans)


N = int(input())
S = input()
A = [0] * N
B = [0] * N
for i in range(1, N):
	A[i] = A[i - 1] + (1 if S[i - 1] == 'W' else 0)
	B[N - i - 1] = B[N - i] + (1 if S[N - i] == 'E' else 0)
print(min(map(lambda x: x[0] + x[1], zip(A, B))))


import math
n = int(input())
s = input()
eS = [0] * n
wS = [0] * n
ec = 0
for i in range(n):
	eS[i] = ec
	if s[i] == 'W':
		ec += 1
wc = 0
for i in reversed(list(range(n))):
	wS[i] = wc
	if s[i] == 'E':
		wc += 1
ans = 10000000
for i in range(n):
	ans = min(ans, eS[i] + wS[i])
print(ans)


n = int(input())
s = input()
e = s.count('E')
w = s.count('W')
ans = 1000000
e_counter = 0
w_counter = 0
for i in range(len(s)):
	if s[i] == 'E':
		e_counter += 1
	else:
		w_counter += 1
	d = w_counter
	if s[i] == 'W':
		d -= 1
	ans1 = d + (e - e_counter)
	ans = min(ans1, ans)
print(ans)


N = int(input())
S = list(input())
directed = [S[1:].count('W')]
for i in range(1, len(S)):
	d = directed[i - 1]
	if S[i - 1] == 'E':
		d += 1
	if S[i] == 'W':
		d -= 1
	directed.append(d)
print(N - max(directed) - 1)


n = int(input())
s = list(input())
sw = [0]
se = [0]
swc = 0
sec = 0
for i in range(n):
	if s[i] == 'W':
		swc += 1
	else:
		sec += 1
	sw.append(swc)
	se.append(sec)
m = n
for i in range(n + 1):
	m = min(m, sw[i] + se[-1] - se[i])
print(m)


n = int(input())
A = input()
e = A.count('E')
cnt = e
for i in A:
	if i == 'E':
		cnt -= 1
	else:
		cnt += 1
	e = min(e, cnt)
print(e)


N = int(input())
S = input()
tmp = 0
for i in range(1, N):
	if S[i] == 'E':
		tmp += 1
ans = 10 ** 6
for i in range(N):
	if ans > tmp:
		ans = tmp
	if i == N - 1:
		break
	if S[i] == 'W':
		tmp += 1
	if S[i + 1] == 'E':
		tmp -= 1
print(ans)


N = int(input())
S = input()
w_cnt = 0
e_cnt = 0
w_lst = []
e_lst = []
for s in S:
	if s == 'W':
		w_cnt += 1
	else:
		e_cnt += 1
	w_lst.append(w_cnt)
	e_lst.append(e_cnt)
ans = float('inf')
e_all = e_lst[-1]
for i in range(N):
	if S[i] == 'W':
		t = w_lst[i] - 1 + e_all - e_lst[i]
	else:
		t = w_lst[i] + e_all - e_lst[i]
	ans = min(ans, t)
print(ans)


n = int(input())
a = list(input())
(wcnt, ecnt, ans, box) = (0, 0, 0, [])
W = a.count('W')
E = a.count('E')
for i in range(n - 1):
	if a[i] == 'W':
		box.append(E + wcnt)
		wcnt += 1
		W -= 1
	else:
		box.append(E + wcnt)
		ecnt += 1
		E -= 1
if a[n - 1] == 'W':
	W -= 1
	box.append(E + wcnt)
	wcnt += 1
else:
	E -= 1
	box.append(E + wcnt)
	ecnt += 1
print(min(box))


n = int(input())
s = input()
e_all = s.count('E')
w_all = s.count('W')
e_l = 0
w_l = 0
unti = [0] * n
for i in range(n):
	if s[i] == 'E':
		e_l += 1
		unti[i] = w_l + (e_all - e_l)
	if s[i] == 'W':
		unti[i] = w_l + (e_all - e_l)
		w_l += 1
print(min(unti))


n = int(input())
s = input()
left = [0] * n
right = [0] * n
tmp = 0
for i in range(1, n):
	if s[i - 1] == 'W':
		tmp += 1
		left[i] = tmp
	else:
		left[i] = tmp
tmp = 0
for i in range(n - 2, -1, -1):
	if s[i + 1] == 'E':
		tmp += 1
		right[i] = tmp
	else:
		right[i] = tmp
res = 10 ** 9
for i in range(n):
	res = min(res, left[i] + right[i])
print(res)


N = int(input())
S = input()
EP = [0] * (N + 1)
WP = [0] * (N + 1)
CP = [0] * N
for T in range(0, N):
	EP[N - T - 1] = EP[N - T] + (S[N - 1 - T] == 'E')
	WP[T + 1] = WP[T] + (S[T] == 'W')
for T in range(0, N):
	CP[T] = EP[T + 1] + WP[T]
print(min(CP))


import sys
read = sys.stdin.read
readline = sys.stdin.readline
readlines = sys.stdin.readlines
sys.setrecursionlimit(10 ** 9)
INF = 1 << 60
MOD = 1000000007

def main():
	N = int(readline())
	S = readline().strip()
	east = [0] * (N + 1)
	west = [0] * (N + 1)
	for i in range(N):
		east[i + 1] = east[i] + (1 if S[i] == 'E' else 0)
		west[i + 1] = west[i] + (1 if S[i] == 'W' else 0)
	ans = INF
	for i in range(N):
		if ans > west[i] + east[N] - east[i + 1]:
			ans = west[i] + east[N] - east[i + 1]
	print(ans)
	return

def __starting_point():
	main()
__starting_point()


n = int(input())
s = input()
v = [0 for i in range(n)]
for i in range(n):
	j = 0
	if s[i] == 'E':
		j = 1
	else:
		j = -1
	if i == 0:
		v[i] += j
	else:
		v[i] += j + v[i - 1]
sum = -2
w = 0
res = ''
for i in range(n):
	if sum < v[i]:
		sum = v[i]
		wmax = w
		emax = i - w
		res = s[i]
	if s[i] == 'W':
		w += 1
if res == 'W':
	print(wmax + s.count('E') - emax)
else:
	print(wmax + s.count('E') - emax - 1)


N = int(input())
S = list(input())
allW = S.count('W')
allE = S.count('E')
numW = S.count('E')
numE = 0
ans = 3 * 10 ** 5
for i in range(N):
	if S[i] == 'E':
		numW -= 1
	ans = min(ans, numW + numE)
	if S[i] == 'W':
		numE += 1
print(ans)


N = int(input())
S = list(input())
lst = [0] * N
Re = S.count('E')
Lw = 0
for i in range(N):
	if S[i] == 'E':
		Re -= 1
		lst[i] = Re + Lw
	else:
		Lw += 1
		lst[i] = Re + Lw - 1
ans = min(lst)
print(ans)


n = int(input())
s = input()
dp_w = [0]
dp_e = [0]
for i in range(n):
	if i != 0:
		dp_w.append(dp_w[-1])
		dp_e.append(dp_e[-1])
	if s[i] == 'W':
		dp_w[-1] += 1
	else:
		dp_e[-1] += 1

def migi(i):
	if i == n - 1:
		return 0
	return dp_e[n - 1] - dp_e[i]

def hidari(i):
	if i == 0:
		return 0
	return dp_w[i - 1]
ans = 1000000000000000
for i in range(n):
	right = migi(i)
	left = hidari(i)
	ans = min(right + left, ans)
print(ans)


n = int(input())
s = list(input())
cnt = 0
ans_list = [0]
e_cnt = 0
for i in range(1, n):
	if s[i - 1] == 'E' and s[i] == 'E':
		cnt -= 1
		e_cnt += 1
	if s[i - 1] == 'E' and s[i] == 'W':
		cnt -= 0
	if s[i - 1] == 'W' and s[i] == 'E':
		cnt += 0
		e_cnt += 1
	if s[i - 1] == 'W' and s[i] == 'W':
		cnt += 1
	ans_list.append(cnt)
print(min(ans_list) + e_cnt)


from collections import Counter
n = int(input())
s = input()
sn = Counter(s)
l = 0
r = sn['E']
ans = r
for i in range(n):
	if s[i] == 'W':
		l += 1
	else:
		r -= 1
	ans = min(ans, l + r)
print(ans)


n = int(input())
s = input()
ans = [0] * (n + 1)
for i in range(n):
	if s[i] == 'E':
		ans[i + 1] = ans[i] + 1
	else:
		ans[i + 1] = ans[i]
print(min((i - ans[i] + ans[n] - ans[i + 1] for i in range(n))))


def count(left_w, right_e):
	return left_w + right_e

def main():
	n = int(input())
	s = str(input())
	w_count = s.count('W')
	e_count = n - w_count
	lst = []
	left = 0
	left_w = 0
	right = n
	right_e = e_count
	for i in range(n):
		s_alp = s[i]
		right -= 1
		if s_alp == 'E':
			right_e -= 1
		lst.append(count(left_w, right_e))
		left += 1
		if s_alp == 'W':
			left_w += 1
	minimum = min(lst)
	print(minimum)

def __starting_point():
	main()
__starting_point()


n = int(input())
s = input()
e = s.count('E')
w = n - e
ans = 10 ** 9
if s[0] == 'W':
	cnt = e
else:
	cnt = e - 1
num = cnt
for i in range(n - 1):
	if s[i] == s[i + 1] and s[i] == 'E':
		cnt -= 1
	elif s[i] == s[i + 1]:
		cnt += 1
	ans = min(ans, cnt, num)
	ans = max(ans, 0)
print(max(ans, 0))


n = int(input())
s = list(input())
ans = [0] * n
ans[0] += list(s[1:]).count('E')
for i in range(1, n):
	if s[i] == 'E' and s[i - 1] == 'E':
		ans[i] = ans[i - 1] - 1
	elif s[i] == 'E' and s[i - 1] == 'W' or (s[i - 1] == 'E' and s[i] == 'W'):
		ans[i] = ans[i - 1]
	else:
		ans[i] = ans[i - 1] + 1
print(min(ans))


N = int(input())
S = list(input())
W = [0] * N
E = [0] * N
W_pre = E_pre = 0
for i in range(N):
	if S[i] == 'W':
		W[i] = W_pre + 1
		E[i] = E_pre
	else:
		W[i] = W_pre
		E[i] = E_pre + 1
	W_pre = W[i]
	E_pre = E[i]
ans = N
for i in range(N):
	if i > 0:
		res1 = W[i - 1]
	else:
		res1 = 0
	res2 = E[N - 1] - E[i]
	ans = min(ans, res1 + res2)
print(ans)


N = int(input())
S = input()
l = 0
r = S[1:N].count('E')
ans = l + r
for n in range(1, N):
	if S[n - 1] == 'W':
		l += 1
	if S[n] == 'E':
		r -= 1
	ans = min(ans, l + r)
print(ans)


n = int(input())
s = input()
count = s.count('E')
ans = s.count('E')
for i in range(len(s)):
	if s[i] == 'E':
		count -= 1
	else:
		count += 1
	ans = min(count, ans)
print(ans)


import sys, re, os
from collections import deque, defaultdict, Counter
from math import ceil, sqrt, hypot, factorial, pi, sin, cos, radians, gcd
from itertools import permutations, combinations, product, accumulate
from operator import itemgetter, mul
from copy import deepcopy
from string import ascii_lowercase, ascii_uppercase, digits
from functools import reduce
from bisect import bisect_left, insort_left
from heapq import heapify, heappush, heappop
INPUT = lambda : sys.stdin.readline().rstrip()
INT = lambda : int(INPUT())
MAP = lambda : list(map(int, INPUT().split()))
S_MAP = lambda : list(map(str, INPUT().split()))
LIST = lambda : list(map(int, INPUT().split()))
S_LIST = lambda : list(map(str, INPUT().split()))
sys.setrecursionlimit(10 ** 9)
INF = float('inf')
mod = 10 ** 9 + 7

def main():
	N = INT()
	S = INPUT()
	(left, right) = (0, S[1:].count('E'))
	ans = left + right
	for i in range(N - 1):
		if S[i] == 'W':
			left += 1
		if S[i + 1] == 'E':
			right -= 1
		ans = min(ans, left + right)
	print(ans)

def __starting_point():
	main()
__starting_point()


def solve(N, S):
	W_sum = [0]
	E_sum = [0]
	for s in list(S):
		if s == 'W':
			W_sum.append(W_sum[-1] + 1)
			E_sum.append(E_sum[-1])
		else:
			W_sum.append(W_sum[-1])
			E_sum.append(E_sum[-1] + 1)
	ans = N + 1
	for i in range(1, N + 1):
		ans = min(W_sum[i - 1] + (E_sum[-1] - E_sum[i]), ans)
	print(ans)

def __starting_point():
	N = int(input())
	S = input()
	solve(N, S)
__starting_point()


n = int(input())
s = list(input())
E = s.count('E')
W = s.count('W')
if s[0] == 'E':
	ans = E - 1
else:
	ans = E
ans1 = []
ans1.append(ans)
for x in range(1, n):
	if s[x] == 'E':
		if s[x - 1] == 'E':
			ans -= 1
	elif s[x - 1] == 'W':
		ans += 1
	ans1.append(ans)
print(min(ans1))


def main():
	N = int(input())
	S = input()
	lst = [0] * N
	ans = N
	if S[0] == 'E':
		lst[0] = 1
	for i in range(1, N):
		if S[i] == 'E':
			lst[i] = lst[i - 1] + 1
		else:
			lst[i] = lst[i - 1]
	for i in range(N):
		if i == 0:
			left = 0
		else:
			left = i - lst[i - 1]
		right = lst[N - 1] - lst[i]
		if left + right < ans:
			ans = left + right
	print(ans)

def __starting_point():
	main()
__starting_point()


N = int(input())
S = list(input())
E = S[1:].count('E')
W = 0
mi = E + W
for i in range(1, N):
	if S[i] == 'E':
		E -= 1
	if S[i - 1] == 'W':
		W += 1
	if E + W <= mi:
		mi = E + W
print(mi)


N = int(input())
S = input()
west = [0] * N
east = [0] * N
tmp = 0
for i in range(1, N):
	if S[i - 1] == 'W':
		tmp += 1
		west[i] = tmp
	else:
		west[i] = tmp
tmp = 0
for i in range(N - 2, -1, -1):
	if S[i + 1] == 'E':
		tmp += 1
		east[i] = tmp
	else:
		east[i] = tmp
ans = float('inf')
for i in range(N):
	ans = min(ans, west[i] + east[i])
print(ans)


import sys
N = int(input())
S = input()
W = [0] * N
E = [0] * N
ans = N
for i in range(1, N):
	W[i] = W[i - 1] + 1 if S[i - 1] == 'W' else W[i - 1]
	E[-i - 1] = E[-i] + 1 if S[-i] == 'E' else E[-i]
for i in range(N):
	ans = min(W[i] + E[i], ans)
print(ans)


n = int(input())
S = list(input())
W = [0] * (n + 1)
E = [0] * (n + 1)
for i in range(n):
	W[i] = W[i - 1] + S[i].count('W')
	E[n - i - 1] = E[n - i] + S[n - i - 1].count('E')
W = W[:n]
E = E[:n]
ans = 1000000
for i in range(n):
	ans = min(ans, W[i] + E[i] - 1)
print(ans)


n = int(input())
s = input()
W = 0
E = s[1:].count('E')
ans = float('inf')
for i in range(n):
	ans = min(ans, W + E)
	if i == n - 1:
		print(ans)
		return
	if s[i] == 'W':
		W += 1
	if s[i + 1] == 'E':
		E -= 1


N = int(input())
S = input()
e_all = S.count('E')
w_cnt = 0
e_cnt = 0
ans = float('inf')
for i in range(N):
	if S[i] == 'W':
		w_cnt += 1
		ans = min(ans, w_cnt - 1 + e_all - e_cnt)
	else:
		e_cnt += 1
		ans = min(ans, w_cnt + e_all - e_cnt)
print(ans)


n = int(input())
s = input()
from collections import Counter
count = Counter(s[1:])
x = count['E']
temp = x
for i in range(1, n):
	if s[i - 1] == 'W':
		x += 1
	if s[i] == 'E':
		x -= 1
	temp = min(temp, x)
print(temp)


N = int(input())
S = input()
west = S.count('W')
east = N - west
Q = [0, 0, west, east]
ans = N - 1
for i in range(N):
	if S[i] == 'W':
		Q[2] -= 1
		cnt = Q[0] + Q[3]
		Q[0] += 1
	else:
		Q[3] -= 1
		cnt = Q[0] + Q[3]
		Q[1] += 1
	ans = min(ans, cnt)
print(ans)


N = int(input())
r = input()
E_sum = sum((x == 'E' for x in r))
W_sum = N - E_sum
left_sum = 0
right_sum = E_sum
min_sum = E_sum
for i in range(N):
	if i == 0:
		if r[i] == 'E':
			min_sum -= 1
		prev_sum = min_sum
	elif (r[i - 1], r[i]) == ('W', 'W'):
		prev_sum += 1
	elif (r[i - 1], r[i]) == ('E', 'W'):
		pass
	elif (r[i - 1], r[i]) == ('E', 'E'):
		prev_sum -= 1
	elif (r[i - 1], r[i]) == ('W', 'E'):
		pass
	if min_sum > prev_sum:
		min_sum = prev_sum
print(min_sum)


n = int(input())
s = input()
total_E = s.count('E')
total_W = n - total_E
right_E = []
tmp_E = total_E
tmp_W = 0
for i in range(n):
	if s[i] == 'E':
		tmp_E -= 1
	right_E.append(tmp_E)
left_W = [0]
for i in range(1, n):
	if s[i - 1] == 'W':
		tmp_W += 1
	left_W.append(tmp_W)
candidates = []
for i in range(n):
	candidates.append(right_E[i] + left_W[i])
ans = min(candidates)
print(ans)


n = int(input())
s = [(i == 'W') * 1 for i in list(input())]
c = [0] * (n + 1)
for i in range(n):
	c[i + 1] = c[i] + s[i]
ans = float('inf')
for i in range(n):
	t = c[i] + (n - i - 1 - c[-1] + c[i + 1])
	ans = min(ans, t)
print(ans)


inf = float('inf')
n = int(input())
s = input()
right_e = s.count('E')
left_w = 0
cnt = inf
for e in s:
	if e == 'W':
		cnt = min(cnt, right_e + left_w)
		left_w += 1
	else:
		right_e -= 1
		cnt = min(cnt, right_e + left_w)
print(cnt)


N = int(input())
S = input()
a = [0]
for i in range(N):
	a.append(a[-1])
	if S[i] == 'W':
		a[-1] += 1
ans = N
for i in range(N):
	ans = min(ans, a[i] + N - (i + 1) - (a[N] - a[i + 1]))
print(ans)


n = int(input())
s = input()
wcnt = [0] * n
ecnt = [0] * n
enum = 0
wnum = 0
for i in range(n):
	if s[i] == 'W':
		wnum += 1
	wcnt[i] += wnum
	if s[-i - 1] == 'E':
		enum += 1
	ecnt[-i - 1] += enum
ans = 10 ** 10
for i in range(n):
	temp = 0
	if i - 1 >= 0:
		temp += wcnt[i - 1]
	if i + 1 < n:
		temp += ecnt[i + 1]
	ans = min(ans, temp)
print(ans)


N = int(input())
S = input()
ans = S.count('W')
ans1 = -10
for i in range(N):
	if S[i] == 'W':
		ans -= 1
	if i != 0:
		if S[i - 1] == 'E':
			ans += 1
	ans1 = max(ans, ans1)
print(N - 1 - ans1)


n = int(input())
s = input()
(l, r) = ([], [])
ans = min(s.count('W'), s.count('E'))
k = s.count('E')
for i in range(n):
	if s[i] == 'W':
		k += 1
	else:
		k -= 1
	ans = min(ans, k)
print(ans)


def main():
	n = int(input())
	ss = list(input())
	num_sum = [0] * n
	west_sum = 0
	east_sum = 0
	for i in range(1, n):
		if ss[i - 1] == 'W':
			west_sum += 1
		num_sum[i] += west_sum
	for i in range(n - 2, -1, -1):
		if ss[i + 1] == 'E':
			east_sum += 1
		num_sum[i] += east_sum
	ans = min(num_sum)
	print(ans)

def __starting_point():
	main()
__starting_point()


from itertools import accumulate
n = int(input())
s = list(input())
l = [1 if s[i] == 'E' else 0 for i in range(n)]
l = list(accumulate(l))
ans = l[-1] - l[0]
for i in range(1, n):
	ans = min(ans, i - l[i - 1] + l[-1] - l[i])
print(ans)


def schange(s):
	if s == 'E':
		return 1
	else:
		return 0
n = int(input())
s = list(map(schange, input()))
ssum = [0] * (n + 1)
for i in range(n):
	ssum[i + 1] = ssum[i] + s[i]
ans = float('inf')
for i in range(1, n + 1):
	turnE = i - 1 - ssum[i - 1]
	turnW = ssum[-1] - ssum[i]
	ans = min(ans, turnE + turnW)
print(ans)


N = int(input())
S = input()
oE = S.count('E')
Wo = 0
L = []
for i in range(N):
	if i == 0:
		if S[i] == 'E':
			oE -= 1
	else:
		if S[i - 1] == 'W':
			Wo += 1
		if S[i] == 'E':
			oE -= 1
	L.append(Wo + oE)
	if Wo + oE == 0:
		break
print(min(L))


n = int(input())
s = input()
li = []
for i in range(n):
	if s[i] == 'W':
		li.append(-1)
	else:
		li.append(1)
cumsum = [li[0]]
for i in range(n - 1):
	cumsum.append(cumsum[i] + li[i + 1])
l = cumsum.index(max(cumsum))
w_to_e = 0
e_to_w = 0
for i in range(n):
	if i < l:
		if li[i] == -1:
			w_to_e += 1
	elif i > l:
		if li[i] == 1:
			e_to_w += 1
print(e_to_w + w_to_e)


from collections import deque
N = int(input())
S = input()
left = deque([0])
right = [0]
for i in range(N):
	if S[i] == 'W':
		plus = 1
	else:
		plus = 0
	left.append(left[-1] + plus)
	if S[-i - 1] == 'E':
		plus = 1
	else:
		plus = 0
	right.append(right[-1] + plus)
left.popleft()
right = right[::-1]
right.pop()
print(min([left[i] + right[i] for i in range(N)]) - 1)


N = int(input())
S = list(str(input()))
east = S[1:].count('E')
ans_min = east
ans = east
for l in range(1, N):
	if S[l - 1] == 'W':
		ans += 1
	if S[l] == 'E':
		ans -= 1
	if ans <= 0:
		ans_min = 0
		break
	if ans < ans_min:
		ans_min = ans
print(ans_min)


N = int(input())
S = list(input())
dp_f = [0 for _ in range(N)]
dp_b = [0 for _ in range(N)]
for n in range(1, N):
	if S[n - 1] == 'W':
		tmp = 1
	else:
		tmp = 0
	dp_f[n] = dp_f[n - 1] + tmp
for n in reversed(range(N - 1)):
	if S[n + 1] == 'E':
		tmp = 1
	else:
		tmp = 0
	dp_b[n] = dp_b[n + 1] + tmp
MIN = N
for n in range(N):
	if n == N - 1:
		MIN = min(MIN, dp_f[N - 1])
	elif n == 0:
		MIN = min(MIN, dp_b[0])
	else:
		MIN = min(MIN, dp_f[n] + dp_b[n])
print(MIN)


n = int(input())
s = input()
cnt_e = [0] * n
cnt_w = [0] * n
for i in range(n):
	if i == 0:
		if s[i] == 'E':
			cnt_e[i] = 1
		else:
			cnt_w[i] = 1
	elif s[i] == 'E':
		cnt_e[i] = cnt_e[i - 1] + 1
		cnt_w[i] = cnt_w[i - 1]
	else:
		cnt_e[i] = cnt_e[i - 1]
		cnt_w[i] = cnt_w[i - 1] + 1
ans = 3 * 10 ** 5 + 1
for i in range(n):
	if s[i] == 'E':
		e = cnt_e[-1] - cnt_e[i]
		w = cnt_w[i]
	else:
		e = cnt_e[-1] - cnt_e[i]
		w = cnt_w[i] - 1
	ans = min(ans, e + w)
print(ans)


N = int(input())
S = input()
S = 'N' + S + 'N'
ans = 0
E = 0
W = S.count('W')
for i in range(1, N + 1):
	if S[i - 1] == 'E':
		E += 1
	if S[i] == 'W':
		W -= 1
	tmp = E + W
	if tmp > ans:
		ans = tmp
ans = N - 1 - ans
print(ans)


n = int(input())
s = input()
west_back = s.count('W')
east_back = n - west_back
west_front = 0
east_front = 0
ans = 10 ** 6
for i in range(n):
	if s[i] == 'W':
		west_front += 1
		west_back -= 1
		key = west_front + east_back - 1
	else:
		east_front += 1
		east_back -= 1
		key = west_front + east_back
	ans = min(ans, key)
print(ans)


N = int(input())
N_List = str(input())
C_Ans = N_List[1:].count('E')
Ans = C_Ans
for i in range(1, N):
	C_Ans = C_Ans + (0, 1)[N_List[i - 1] == 'W'] - (0, 1)[N_List[i] == 'E']
	if C_Ans < Ans:
		Ans = C_Ans
print(Ans)


n = int(input())
s = input()
cnt = s.count('E')
ans = cnt
for i in range(n):
	if s[i] == 'E':
		cnt -= 1
		if ans > cnt:
			ans = cnt
	else:
		cnt += 1
print(ans)


import sys
import numpy as np
stdin = sys.stdin

def ns():
	return stdin.readline().rstrip()

def ni():
	return int(stdin.readline().rstrip())

def nm():
	return list(map(int, stdin.readline().split()))

def nl():
	return list(map(int, stdin.readline().split()))

def main():
	n = ni()
	S = ns()
	E = np.cumsum([1 if s == 'E' else 0 for s in S][::-1])[::-1]
	W = np.cumsum([1 if s == 'W' else 0 for s in S])
	ans = E + W
	print(np.min(ans) - 1)

def __starting_point():
	main()
__starting_point()


N = int(input())
S = input()
L = [0] * (N + 1)
for i in range(N):
	if S[i] == 'E':
		L[i + 1] = L[i] + 1
	else:
		L[i + 1] = L[i]
print(min((i - L[i] + L[N] - L[i + 1] for i in range(N))))


n = int(input())
s = input()
dp = [0] * n
for i in range(1, n):
	if s[i] == 'E':
		dp[0] += 1
for i in range(1, n):
	dp[i] = dp[i - 1]
	if s[i - 1] == 'W':
		dp[i] += 1
	if s[i] == 'E':
		dp[i] -= 1
print(min(dp))


import sys
import re
from collections import deque, defaultdict, Counter
from math import ceil, sqrt, hypot, factorial, pi, sin, cos, radians, gcd
from itertools import accumulate, permutations, combinations, product
from operator import itemgetter, mul
from copy import deepcopy
from string import ascii_lowercase, ascii_uppercase, digits
from bisect import bisect, bisect_left
from heapq import heappush, heappop
from functools import reduce

def input():
	return sys.stdin.readline().strip()

def INT():
	return int(input())

def MAP():
	return list(map(str, input().split()))

def LIST():
	return list(map(int, input().split()))
sys.setrecursionlimit(10 ** 9)
INF = float('inf')
mod = 10 ** 9 + 7
N = INT()
S = [_ for _ in input()]
(left, right) = (0, S[1:].count('E'))
ans = left + right
for i in range(N - 1):
	if S[i] == 'W':
		left += 1
	if S[i + 1] == 'E':
		right -= 1
	ans = min(ans, left + right)
print(ans)