Buggy python submission (verdict: Runtime Error):
import numpy as np

N = int(input())
s = input()
w = np.array(list(map(lambda x: 1 if x == 'W' else 0, s)))
e = np.array(list(map(lambda x: 1 if x == 'E' else 0, s)))
w = np.add.accumulate(w)
e = np.flip(e)
e = np.add.accumulate(e)
e = np.flip(e)
ans = []
for i in range(N):
    num = 0
    ans.append(num)
print(min(ans))

Fixed submission:
from itertools import accumulate
N = int(input())
s = input()
w = list(map(lambda x: 1 if x == 'W' else 0, s))
e = list(map(lambda x: 1 if x == 'E' else 0, s))
e.reverse()
w = list(accumulate(w))
e = list(accumulate(e))
e.reverse()
# print(w)
# print(e)
ans = []
for i in range(N):
    num = 0
    if 0 < i: num += w[i - 1]
    if i < N - 1: num += e[i + 1]
    ans.append(num)
# print(ans)
print(min(ans))

Buggy python submission (verdict: Runtime Error):
import numpy as np
# from itertools import accumulate

N = int(input())
s = input()
w = np.array(list(map(lambda x: 1 if x == 'W' else 0, s)))
e = np.array(list(map(lambda x: 1 if x == 'E' else 0, s)))
w = np.add.accumulate(w)
e = np.flip(e)
e = np.add.accumulate(e)
e = np.flip(e)
# print(w)
# print(e)
ans = []
for i in range(N):
    num = 0
    if 0 < i: num += w[i - 1]
    if i < N - 1: num += e[i + 1]
    ans.append(num)
# print(ans)
print(min(ans))

Fixed submission:
from itertools import accumulate
N = int(input())
s = input()
w = list(map(lambda x: 1 if x == 'W' else 0, s))
e = list(map(lambda x: 1 if x == 'E' else 0, s))
e.reverse()
w = list(accumulate(w))
e = list(accumulate(e))
e.reverse()
# print(w)
# print(e)
ans = []
for i in range(N):
    num = 0
    if 0 < i: num += w[i - 1]
    if i < N - 1: num += e[i + 1]
    ans.append(num)
# print(ans)
print(min(ans))

Buggy python submission (verdict: Runtime Error):
import numpy as np
# from itertools import accumulate

N = int(input())
s = input()
w = np.array(list(map(lambda x: 1 if x == 'W' else 0, s)))
e = np.array(list(map(lambda x: 1 if x == 'E' else 0, s)))
w = np.add.accumulate(w)
e = np.flip(np.add.accumulate(np.flip(e)))
# print(w)
# print(e)
ans = []
for i in range(N):
    num = 0
    if 0 < i: num += w[i - 1]
    if i < N - 1: num += e[i + 1]
    ans.append(num)
# print(ans)
print(min(ans))

Fixed submission:
from itertools import accumulate
N = int(input())
s = input()
w = list(map(lambda x: 1 if x == 'W' else 0, s))
e = list(map(lambda x: 1 if x == 'E' else 0, s))
e.reverse()
w = list(accumulate(w))
e = list(accumulate(e))
e.reverse()
# print(w)
# print(e)
ans = []
for i in range(N):
    num = 0
    if 0 < i: num += w[i - 1]
    if i < N - 1: num += e[i + 1]
    ans.append(num)
# print(ans)
print(min(ans))

Buggy python submission (verdict: Runtime Error):
import numpy as np
from itertools import accumulate

N = int(input())
s = input()
w = np.array(list(map(lambda x: 1 if x == 'W' else 0, s)))
e = np.array(list(map(lambda x: 1 if x == 'E' else 0, s)))
w = np.add.accumulate(w)
e = np.flip(np.add.accumulate(np.flip(e)))
# print(w)
# print(e)
ans = []
for i in range(N):
    num = 0
    if 0 < i: num += w[i - 1]
    if i < N - 1: num += e[i + 1]
    ans.append(num)
# print(ans)
print(min(ans))

Fixed submission:
from itertools import accumulate
N = int(input())
s = input()
w = list(map(lambda x: 1 if x == 'W' else 0, s))
e = list(map(lambda x: 1 if x == 'E' else 0, s))
e.reverse()
w = list(accumulate(w))
e = list(accumulate(e))
e.reverse()
# print(w)
# print(e)
ans = []
for i in range(N):
    num = 0
    if 0 < i: num += w[i - 1]
    if i < N - 1: num += e[i + 1]
    ans.append(num)
# print(ans)
print(min(ans))