Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque
from heapq import heapify,heappop,heappush,heappushpop
from copy import copy,deepcopy
from itertools import permutations,combinations
from collections import Counter
from pprint import pprint

def myinput():
    return map(int,input().split())

def mycol(data,col):
    return [ row[col] for row in data ]

def mysort(data,col):
    data.sort(key=lambda x:x[col],reverse=False)
    return data

def mymax(data):
    M = -1*float("inf")
    for i in range(len(data)):
        m = max(data[i])
        M = max(M,m)
    return M

def mymin(data):
    m = float("inf")
    for i in range(len(data)):
        M = min(data[i])
        m = min(m,M)
    return m

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

r = []
g = []
b = []
for i in range(n):
    if s[i]=="R":
        r.append(i)
    elif s[i]=="G":
        g.append(i)
    elif s[i]=="B":
        b.append(i)
    else:
        pass
# print(r,g,b)
count = 0
for i in r:
    for j in g:
        # print(i,j)
        if i<j:
            x = i
            y = j
        else:
            x = j
            y = i
        k1 = y + (y - x)
        if k1 in b:    
            count += 1
        k2 = x - (y - x)
        if k2 in b:
            count += 1
        k3 = (x+y)/2
        if k3 in b:
            count += 1
# print(len(r) * len(g) * len(b))
# print(count)
ans = len(r) * len(g) * len(b) - count
print(ans)

Fixed submission:
n = int(input())
s = input()

r = []
g = []
b = []
for i in range(n):
    if s[i]=="R":
        r.append(i)
    elif s[i]=="G":
        g.append(i)
    elif s[i]=="B":
        b.append(i)
    else:
        pass
# print(r,g,b)
count = 0
for i in range(n):
    x = s[i]
    for sa in range(n):
        j = i + sa
        k = j + sa
        if j<n:
            y = s[j]
        else:
            break
        if k<n:
            z = s[k]
        else:
            break
        if x!=y and y!=z and z!=x:
            count += 1
# print(count)
ans = len(r) * len(g) * len(b) - count
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque
from heapq import heapify,heappop,heappush,heappushpop
from copy import copy,deepcopy
from itertools import permutations,combinations
from collections import Counter
from pprint import pprint

def myinput():
    return map(int,input().split())

def mycol(data,col):
    return [ row[col] for row in data ]

def mysort(data,col):
    data.sort(key=lambda x:x[col],reverse=False)
    return data

def mymax(data):
    M = -1*float("inf")
    for i in range(len(data)):
        m = max(data[i])
        M = max(M,m)
    return M

def mymin(data):
    m = float("inf")
    for i in range(len(data)):
        M = min(data[i])
        m = min(m,M)
    return m

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

r = []
g = []
b = []
for i in range(n):
    if s[i]=="R":
        r.append(i)
    elif s[i]=="G":
        g.append(i)
    elif s[i]=="B":
        b.append(i)
    else:
        pass
# print(r,g,b)
count = 0
for i in r:
    for j in g:
        for k in b:
            a = [i,j,k]
            a.sort()
            if (a[1]-a[0])!=(a[2]-a[1]):
                count += 1
print(count)

Fixed submission:
n = int(input())
s = input()

r = []
g = []
b = []
for i in range(n):
    if s[i]=="R":
        r.append(i)
    elif s[i]=="G":
        g.append(i)
    elif s[i]=="B":
        b.append(i)
    else:
        pass
# print(r,g,b)
count = 0
for i in range(n):
    x = s[i]
    for sa in range(n):
        j = i + sa
        k = j + sa
        if j<n:
            y = s[j]
        else:
            break
        if k<n:
            z = s[k]
        else:
            break
        if x!=y and y!=z and z!=x:
            count += 1
# print(count)
ans = len(r) * len(g) * len(b) - count
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque
from heapq import heapify,heappop,heappush,heappushpop
from copy import copy,deepcopy
from itertools import permutations,combinations
from collections import Counter
from pprint import pprint

def myinput():
    return map(int,input().split())

def mycol(data,col):
    return [ row[col] for row in data ]

def mysort(data,col):
    data.sort(key=lambda x:x[col],reverse=False)
    return data

def mymax(data):
    M = -1*float("inf")
    for i in range(len(data)):
        m = max(data[i])
        M = max(M,m)
    return M

def mymin(data):
    m = float("inf")
    for i in range(len(data)):
        M = min(data[i])
        m = min(m,M)
    return m

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

r = []
g = []
b = []
for i in range(n):
    if s[i]=="R":
        r.append(i)
    elif s[i]=="G":
        g.append(i)
    elif s[i]=="B":
        b.append(i)
    else:
        pass
# print(r,g,b)

def mycount(r,g,b):
    c = 0
    for i in r:
        ng = [ x for x in g if x>i ]
        nb = [ x for x in b if x>i ]
        for j in ng:
            nb2 = [ y for y in b if y>j ]
            for k in nb2:
                if (j-i)!=(k-j):
                    c += 1
                else:
                    pass
        for j in nb:
            ng2 = [ y for y in g if y>j ]
            for k in ng2:
                if (j-i)!=(k-j):
                    c += 1
                else:
                    pass
    return c

ans = 0
ans += mycount(r,g,b)
ans += mycount(g,r,b)
ans += mycount(b,r,g)
print(ans)

Fixed submission:
n = int(input())
s = input()

r = []
g = []
b = []
for i in range(n):
    if s[i]=="R":
        r.append(i)
    elif s[i]=="G":
        g.append(i)
    elif s[i]=="B":
        b.append(i)
    else:
        pass
# print(r,g,b)
count = 0
for i in range(n):
    x = s[i]
    for sa in range(n):
        j = i + sa
        k = j + sa
        if j<n:
            y = s[j]
        else:
            break
        if k<n:
            z = s[k]
        else:
            break
        if x!=y and y!=z and z!=x:
            count += 1
# print(count)
ans = len(r) * len(g) * len(b) - count
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque
from heapq import heapify,heappop,heappush,heappushpop
from copy import copy,deepcopy
from itertools import permutations,combinations
from collections import Counter
from pprint import pprint

def myinput():
    return map(int,input().split())

def mycol(data,col):
    return [ row[col] for row in data ]

def mysort(data,col):
    data.sort(key=lambda x:x[col],reverse=False)
    return data

def mymax(data):
    M = -1*float("inf")
    for i in range(len(data)):
        m = max(data[i])
        M = max(M,m)
    return M

def mymin(data):
    m = float("inf")
    for i in range(len(data)):
        M = min(data[i])
        m = min(m,M)
    return m

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

r = []
g = []
b = []
for i in range(n):
    if s[i]=="R":
        r.append(i)
    elif s[i]=="G":
        g.append(i)
    elif s[i]=="B":
        b.append(i)
    else:
        pass
# print(r,g,b)

def mycount(r,g,b):
    c = 0
    for i in r:
        ng = [ x for x in g if x>i ]
        for j in ng:
            nb = [ y for y in b if y>j ]
            for k in nb:
                if (j-i)!=(k-j):
                    c += 1
                else:
                    pass
    return c

ans = 0
ans += mycount(r,g,b)
ans += mycount(r,b,g)
ans += mycount(g,r,b)
ans += mycount(g,b,r)
ans += mycount(b,r,g)
ans += mycount(b,g,r)
print(ans)

Fixed submission:
n = int(input())
s = input()

r = []
g = []
b = []
for i in range(n):
    if s[i]=="R":
        r.append(i)
    elif s[i]=="G":
        g.append(i)
    elif s[i]=="B":
        b.append(i)
    else:
        pass
# print(r,g,b)
count = 0
for i in range(n):
    x = s[i]
    for sa in range(n):
        j = i + sa
        k = j + sa
        if j<n:
            y = s[j]
        else:
            break
        if k<n:
            z = s[k]
        else:
            break
        if x!=y and y!=z and z!=x:
            count += 1
# print(count)
ans = len(r) * len(g) * len(b) - count
print(ans)