Harryxun/testdata huggingface dataset:
Buggy python submission (verdict: Time Limit Exceeded):
n, m = map(int, input().split())
x = list(map(int, input().split()))
x.sort()
if n >= m:
    print(0)
    exit()

cost = []
for i in range(m-1):
    cost.append(x[i] - x[i+1])

l = sorted(cost)
ind = [0]
for i in range(n-1):
    j = cost.index(l[i])
    ind.append(j+ 1)
    cost[j] = 0
    
ind.append(m)
ind.sort()

X = []
for i in range(n):
    X.append(x[ind[i]:ind[i+1]])
    
ans = 0
for i in X:
    ans += i[-1] - i[0]
print(ans)

Fixed submission:
n, m = map(int, input().split())
x = list(map(int, input().split()))
x.sort()
if n >= m:
    print(0)
    exit()

cost = []
for i in range(m-1):
    cost.append(x[i+1] - x[i])

cost.sort()
ans = 0
for i in range(m-n):
    ans += cost[i]
print(ans)

Buggy python submission (verdict: Runtime Error):
n, m = map(int, input().split())
x = list(map(int, input().split()))
x.sort()
if n >= m:
    print(0)
    exit()

cost = []
for i in range(m-1):
    cost.append(x[i] - x[i+1])

l = sorted(cost)
ind = [0]
for i in range(n-1):
    ind.append(cost.index(l[i]) + 1)
ind.append(m)
ind.sort()

X = []
for i in range(n):
    X.append(x[ind[i]:ind[i+1]])

ans = 0
for i in X:
    ans += i[-1] - i[0]
print(ans)

Fixed submission:
n, m = map(int, input().split())
x = list(map(int, input().split()))
x.sort()
if n >= m:
    print(0)
    exit()

cost = []
for i in range(m-1):
    cost.append(x[i+1] - x[i])

cost.sort()
ans = 0
for i in range(m-n):
    ans += cost[i]
print(ans)

Buggy python submission (verdict: Runtime Error):
n, m = map(int, input().split())
x = list(map(int, input().split()))
x.sort()

if n >= m:
    print(0)
    exit()
    
cost = []
for i in range(m-1):
    cost.append(x[i] - x[i+1])

l = sorted(cost)
ind = [0]
for i in range(n-1):
    ind.append(cost.index(l[i]) + 1)
ind.append(m)

X = []
for i in range(n):
    X.append(x[ind[i]:ind[i+1]])

ans = 0    
for i in X:
    ans += i[-1] - i[0]

print(ans)

Fixed submission:
n, m = map(int, input().split())
x = list(map(int, input().split()))
x.sort()
if n >= m:
    print(0)
    exit()

cost = []
for i in range(m-1):
    cost.append(x[i+1] - x[i])

cost.sort()
ans = 0
for i in range(m-n):
    ans += cost[i]
print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
n, p = map(int, input().split())

l = []
i = 2
while p > 1:
    if p % i == 0:
        p //= i
        l.append(i)
    else:
        i += 1
        if i > p:
            break
        
ans = 1

for i in set(l):
    m = l.count(i)
    if n <= m:
        ans *= i ** (m // n)

print(ans)

Fixed submission:
n, p = map(int, input().split())
if n == 1:
    print(p)
    exit()
l = []
i = 2
while p > 1:
    if p % i == 0:
        p //= i
        l.append(i)
    else:
        i += 1
        if i > p ** (1/2):
            break
        
ans = 1

for i in set(l):
    m = l.count(i)
    if n <= m:
        ans *= i ** (m // n)

print(ans)
Buggy python submission (verdict: Runtime Error):
s = input()
k = int(input())

for i in len(s):
    if s[i] != "1" and i+1 <= k:
        print(s[i])
        exit()

print(1)

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

for i in range(len(s)):
    if s[i] != "1" and i+1 <= k:
        print(s[i])
        exit()

print(1)
Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
a = list(map(int, input().split()))

d = {}
for ai in a:
    if ai in d.keys():
        d[ai] += 1
    else:
        d[ai] = 1

ans = 0
for k, v in d.items():
    if k > v:
        ans += v
    else:
        ans += v - k

print(ans)

Fixed submission:
n = int(input())
a = sorted(list(map(int, input().split())))

x = a[0]
cnt = 0
ans = 0
for i in range(n):
    if x == a[i]:
       cnt += 1
    else:
        if cnt < x:
            ans += cnt
        else:
            ans += cnt - x
        x = a[i]
        cnt = 1

if cnt < x:
    ans += cnt
else:
    ans += cnt - x

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
a = list(map(int, input().split()))

d = {}
for ai in a:
    if ai not in d.keys():
        d[ai] = 1
    else:
        d[ai] += 1

ans = 0
for k, v in d.items():
    if k > v:
        ans += v
    else:
        ans += v - k

print(ans)

Fixed submission:
n = int(input())
a = sorted(list(map(int, input().split())))

x = a[0]
cnt = 0
ans = 0
for i in range(n):
    if x == a[i]:
       cnt += 1
    else:
        if cnt < x:
            ans += cnt
        else:
            ans += cnt - x
        x = a[i]
        cnt = 1

if cnt < x:
    ans += cnt
else:
    ans += cnt - x

print(ans)
Buggy python submission (verdict: Runtime Error):
n = int(input())
d = list(map(int, input().split()))
m = int(input())
t = list(map(int, input().split()))
d.sort()
t.sort()

l = [0] * (d[-1] + 1)
for i in d:
    l[i] += 1

for i in t:
    l[i] -= 1

l.sort()
if l[0] >= 0:
    print("YES")
else:
    print("NO")

Fixed submission:
n = int(input())
d = list(map(int, input().split()))
m = int(input())
t = list(map(int, input().split()))
d.sort()
t.sort()

a = 0
b = 0
cnt = 0
last = t[-1]
for i in range(a, n):
    for j in range(b, m):
        if d[i] == t[j]:
            cnt += 1
            b = j+1
            break
        elif d[i] < t[j]:
            break

if cnt == m:
    print("YES")
else:
    print("NO")

Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
d = list(map(int, input().split()))
m = int(input())
t = list(map(int, input().split()))
d.sort()
t.sort()

a = 0
cnt = 0
last = t[-1]
for i in range(n):
    for j in range(a, m):
        if d[i] == t[j]:
            cnt += 1
            a = j+1
            break
        elif d[i] > last:
            break
        
if cnt == m:
    print("YES")
else:
    print("NO")

Fixed submission:
n = int(input())
d = list(map(int, input().split()))
m = int(input())
t = list(map(int, input().split()))
d.sort()
t.sort()

a = 0
b = 0
cnt = 0
last = t[-1]
for i in range(a, n):
    for j in range(b, m):
        if d[i] == t[j]:
            cnt += 1
            b = j+1
            break
        elif d[i] < t[j]:
            break

if cnt == m:
    print("YES")
else:
    print("NO")
Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
a = [int(input()) for _ in range(n)]
b = set(a)

ans = 0
for x in b:
    if a.count(x) % 2 == 1:
       ans += 1

print(ans)

Fixed submission:
n = int(input())
a = [int(input()) for _ in range(n)]
b = set(a)
d = {i: 0 for i in b}

for i in a:
    d[i] += 1

ans = 0
for v in d.values():
    if v%2 == 1:
        ans += 1
print(ans)
Buggy python submission (verdict: Runtime Error):
n = int(input())
a = list(map(int, input().split()))
a.sort(reverse = True)

f = 0
x = 0
for i in range(len(a)):
    if a[i] == a[i+1] != x:
        f += 1
    if f == 1:
        x = a[i]
        f += 1
        if a.count(x) >= 4:
          f = 3
    if f >= 3:
        print(x*a[i])
        exit()
print(0)

Fixed submission:
n = int(input())
a = list(map(int, input().split()))
a.sort(reverse = True)

f = 0
x = 0
for i in range(len(a)-1):
    if a[i] == a[i+1] != x:
        f += 1
    if f == 1:
        x = a[i]
        f += 1
        if a.count(x) >= 4:
          f = 3
    if f >= 3:
        print(x*a[i])
        exit()
print(0)

Buggy python submission (verdict: Runtime Error):
n = int(input())
a = list(map(int, input().split()))
a.sort(reverse = True)

l = [0] * (a[0]+10)
f = 0
for i in a:
    l[i-1] += 1
    if l[i-1] == 2 or l[i-1] == 4:
        f += 1
    if f == 1:
        x = i
        f += 1
    if f == 3:
        print(x*i)
        exit()
print(0)

Fixed submission:
n = int(input())
a = list(map(int, input().split()))
a.sort(reverse = True)

f = 0
x = 0
for i in range(len(a)-1):
    if a[i] == a[i+1] != x:
        f += 1
    if f == 1:
        x = a[i]
        f += 1
        if a.count(x) >= 4:
          f = 3
    if f >= 3:
        print(x*a[i])
        exit()
print(0)

Buggy python submission (verdict: Runtime Error):
n = int(input())
a = list(map(int, input().split()))
a.sort(reverse = True)

l = [0] * (a[0])
f = 0
for i in a:
    l[i-1] += 1
    if l[i-1] == 2:
        f += 1
    if f == 1:
        x = i
        f += 1
    if f == 3:
        print(x*i)
        exit()
print(0)

Fixed submission:
n = int(input())
a = list(map(int, input().split()))
a.sort(reverse = True)

f = 0
x = 0
for i in range(len(a)-1):
    if a[i] == a[i+1] != x:
        f += 1
    if f == 1:
        x = a[i]
        f += 1
        if a.count(x) >= 4:
          f = 3
    if f >= 3:
        print(x*a[i])
        exit()
print(0)
Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
a = list(map(int, input().split()))

s = sum(a)
ans = 10**10
for i in range(1, n):
    ans = min(ans, abs(2*sum(a[:i]) - s))
print(ans)

Fixed submission:
n = int(input())
a = list(map(int, input().split()))

s = sum(a)
b = s
ans = 10**10
for i in range(1, n):
    b -= a[-i]
    tmp = abs(2*b - s)
    ans = min(ans, tmp)
print(ans)
Buggy python submission (verdict: Runtime Error):
from scipy.special import comb

n, p = map(int, input().split())
a = list(map(int, input().split()))

odd = 0
even = 0
for x in a:
    if x % 2 == 1:
        odd += 1
    else:
        even += 1

s_even = 0
for i in range(even):
    s_even += comb(even, i+1, exact=True)

s_odd = 0
ans = 0
if p == 0:
    for i in range(odd)[1::2]:
        s_odd += comb(odd, i+1, exact=True)
        ans = max(1,s_even) * max(1,s_odd) + s_odd
else:
    for i in range(odd)[::2]:
        s_odd += comb(odd, i+1, exact=True)
        ans = max(1,s_even) * max(1,s_odd) + s_odd

print(ans)

Fixed submission:
from scipy.misc import comb

n, p = map(int, input().split())
a = list(map(int, input().split()))

odd = 0
even = 0
for x in a:
    if x % 2 == 1:
        odd += 1
    else:
        even += 1

s_even = 0
for i in range(even+1):
    s_even += comb(even, i, exact=True)

s_odd = 0
ans = 0
if p == 0:
    for i in range(odd+1)[::2]:
        s_odd += comb(odd, i, exact=True)
        ans = s_even * s_odd
else:
    for i in range(odd)[1::2]:
        s_odd += comb(odd, i, exact=True)
        ans = s_even * s_odd

print(ans)
Buggy python submission (verdict: Runtime Error):
n = int(input())
a = list(map(int, input().split()))

if n%2 == 1:
    r = a[::-2]
    l = a[1::2]
else:
    r = a[::-2]
    l = a[::2]
    
print(*r,*l)

Fixed submission:
n = int(input())
a = list(map(int, input().split()))

if n%2 == 1:
    r = a[::-2]
    l = a[1::2]
else:
    r = a[::-2]
    l = a[::2]
    
print(*r,end=" ")
print(*l)
Buggy python submission (verdict: Runtime Error):
n = int(input())
a = sorted(list(map(int, input().split())))

x = n%2 + 1
for i in range(n)[n%2+2::2]:
    if a[i] != a[i+1] or a[i] - x != 2:
        print(0)
        exit()
    x = a[i]
    
print(2**(n//2) % (10**9+7)

Fixed submission:
n = int(input())
a = sorted(list(map(int, input().split())))

if n%2:
    a = a[1:]

x = n%2 + 1
for i in range(len(a))[::2]:
    if a[i] != x:
        print(0)
        exit()
    x += 2

print(2**(n//2) % (10**9+7))
Buggy python submission (verdict: Time Limit Exceeded):
x = input()

l = len(x)
r = 0
while l != r:
    l = len(x)
    x = x.replace("ST", "")
    r = len(x)

print(r)

Fixed submission:
x = input()

s = [""]
for xi in x:
    if xi == "S":
        s.append(xi)
    elif xi == "T":
        if s[-1] == "S":
            s.pop()
        else:
            s.append(xi)

print(len(s) - 1)
Buggy python submission (verdict: Runtime Error):
a, b, c = map(int, input())
if b-a == c-b : print('YES')
else: print('NO')



Fixed submission:
a, b, c = map(int, input().split())
if b-a == c-b : print('YES')
else: print('NO')
Buggy python submission (verdict: Runtime Error):
O = input()
E = input()
p = ""
for i in range(len(O)):
    p += O[i]
    if(i - 1 < len(E)):
        p += E[i]
print(p)

Fixed submission:
O = input()
E = input()
p = ""
for i in range(len(O)):
    p += O[i]
    if(i < len(E)):
        p += E[i]
print(p)
Buggy python submission (verdict: Time Limit Exceeded):
n=int(input())
ans=1;
for a in input().split():
    ans*=int(a)
if (ans>1000*1000*1000*1000*1000*1000):
    print(-1)
else:
    print(ans)


Fixed submission:
n=int(input())
ans=1;
i = []
for a in input().split():
    i.append( int(a) )
    if (int(a)==0):
        print(0)
        exit(0)
for l in i:
    ans*=l
    if (ans>1000*1000*1000*1000*1000*1000):
        print(-1)
        exit(0)
print(ans)
Buggy python submission (verdict: Runtime Error):
def solution(a):
    return max(a) - min(a)
 
def main():
    a = [int(i) for i in raw_input().strip().aplit()]
    print solution(a)

if __name__ == '__main__':
    main()

Fixed submission:
def solution(a):
    return max(a) - min(a)
 
def main():
    a = [int(i) for i in raw_input().strip().split()]
    print solution(a)
 
if __name__ == '__main__':
    main()
Buggy python submission (verdict: Time Limit Exceeded):
n, k = map(int, input().split())
a = list(map(int, input().split()))
ma = min(a)

a = list(map(lambda x: x - ma + 1, a))

befscore = 1
score = 1
f = True
for i in range(n):
    score = score * a[i]

    if i >= k:
        score = int(score / a[i - k])
        if befscore >= score:
            print("No")
        else:
            print("Yes")

    befscore = score


Fixed submission:
n, k = map(int, input().split())
a = list(map(int, input().split()))
ma = min(a)

a = list(map(lambda x: x - ma, a))

befscore = 1
score = 1
f = True
for i in range(n):
    score = score + a[i]

    if i >= k:
        score = int(score - a[i - k])
        if befscore >= score:
            print("No")
        else:
            print("Yes")

    befscore = score

Buggy python submission (verdict: Time Limit Exceeded):
n, k = map(int, input().split())
a = list(map(int, input().split()))
befscore = 1
score = 1
f = True
for i in range(n):
    score = score * a[i]

    if i >= k:
        score = int(score / a[i - k])
        if befscore >= score:
            print("No")
        else:
            print("Yes")

    befscore = score


Fixed submission:
n, k = map(int, input().split())
a = list(map(int, input().split()))
ma = min(a)

a = list(map(lambda x: x - ma, a))

befscore = 1
score = 1
f = True
for i in range(n):
    score = score + a[i]

    if i >= k:
        score = int(score - a[i - k])
        if befscore >= score:
            print("No")
        else:
            print("Yes")

    befscore = score

Buggy python submission (verdict: Time Limit Exceeded):
n, k = map(int, input().split())
a = list(map(int, input().split()))
befscore = 1
score = 1
f = True
for i in range(n):
    score *= a[i]

    if i >= k:
        score //= a[i - k]
        if befscore >= score:
            print("No")
        else:
            print("Yes")

    befscore = score


Fixed submission:
n, k = map(int, input().split())
a = list(map(int, input().split()))
ma = min(a)

a = list(map(lambda x: x - ma, a))

befscore = 1
score = 1
f = True
for i in range(n):
    score = score + a[i]

    if i >= k:
        score = int(score - a[i - k])
        if befscore >= score:
            print("No")
        else:
            print("Yes")

    befscore = score

Buggy python submission (verdict: Time Limit Exceeded):
n, k = map(int, input().split())
a = list(map(int, input().split()))
befscore = 1
score = 1
f = True
for i in range(n):
    score *= a[i]

    if i >= k:
        score //= a[i - k]
        if befscore >= score:
            print("No")
        else:
            print("Yes")

    befscore = score


Fixed submission:
n, k = map(int, input().split())
a = list(map(int, input().split()))
ma = min(a)

a = list(map(lambda x: x - ma, a))

befscore = 1
score = 1
f = True
for i in range(n):
    score = score + a[i]

    if i >= k:
        score = int(score - a[i - k])
        if befscore >= score:
            print("No")
        else:
            print("Yes")

    befscore = score
Buggy python submission (verdict: Time Limit Exceeded):
import sys
sys.setrecursionlimit(10**9)

n, m, k = map(int, input().split())
a = list(map(int, input().split()))
b = list(map(int, input().split()))

ans = 0


def shouka(s: str, pa, pb, total):
    global ans
    if s == "a":
        total += a[pa]
        if total > k:
            ans = max(ans, pa + pb)
            return
        pa += 1
    else:
        total += b[pb]
        if total > k:
            ans = max(ans, pa + pb)
            return
        pb += 1
    if pa < n:
        shouka("a", pa, pb, total)
    if pb < m:
        shouka("b", pa, pb, total)

    ans = max(ans, pa+pb)


shouka("a", 0, 0, 0)
shouka("b", 0, 0, 0)
print(ans)


Fixed submission:
n, m, k = map(int, input().split())
A = list(map(int, input().split()))
B = list(map(int, input().split()))

a, b = [0], [0]

for i in range(n):
    a.append(a[i]+A[i])

for i in range(m):
    b.append(b[i]+B[i])

ptr = m
ans = 0

for i in range(n + 1):
    if a[i] > k:
        break
    while a[i] + b[ptr] > k:
        ptr -= 1
    ans = max(ans, i + ptr)

print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
a = list(map(int, input().split()))

a.sort()
a_set = set(a)
for i in range(n-1):
    if a[i] == a[i + 1]:
        if a[i] in a_set:
            a_set.remove(a[i])

dp = [True for _ in range(max(a) + 1)]
ans = 0
y = -1
for x in a:
    if x == y:
        continue
    y = x

    if x in a_set:
        ans += 1 if dp[x] else 0

    while y <= max(a):
        dp[y] = False
        y += x

print(ans)


Fixed submission:
n = int(input())
a = list(map(int, input().split()))

a.sort()
a_set = set(a)
for i in range(n-1):
    if a[i] == a[i + 1]:
        if a[i] in a_set:
            a_set.remove(a[i])

ma = max(a)

dp = [True for _ in range(ma + 1)]
ans = 0
y = -1
for x in a:
    if x == y:
        continue
    y = x

    if x in a_set:
        ans += 1 if dp[x] else 0

    while y <= ma:
        dp[y] = False
        y += x

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
a = list(map(int, input().split()))

a.sort()
a_set = set(a)
for i in range(n-1):
    if a[i] == a[i + 1]:
        if a[i] in a_set:
            a_set.remove(a[i])

dp = [True for _ in range(max(a)+1)]
y = -1
for x in a:
    if x == y:
        continue
    y = 2*x
    while y <= max(a):
        dp[y] = False
        y += x

ans = 0
for x in list(a_set):
    ans += 1 if dp[x] else 0

print(ans)


Fixed submission:
n = int(input())
a = list(map(int, input().split()))

a.sort()
a_set = set(a)
for i in range(n-1):
    if a[i] == a[i + 1]:
        if a[i] in a_set:
            a_set.remove(a[i])

ma = max(a)

dp = [True for _ in range(ma + 1)]
ans = 0
y = -1
for x in a:
    if x == y:
        continue
    y = x

    if x in a_set:
        ans += 1 if dp[x] else 0

    while y <= ma:
        dp[y] = False
        y += x

print(ans)
Buggy python submission (verdict: Runtime Error):
n, k = map(int, input().split())
a = list(map(int, input().split()))

length = [-1] * n
path = [-1, -1]
route = []


def func(now, depth):
    global path, length, a, route
    route.append(now)
    if length[now] == -1:
        length[now] = depth
        func(a[now]-1, depth+1)
    else:
        path = [length[now], depth - length[now]]


func(0, 0)

print(route[path[0]+(k-path[0]) % path[1]]+1)


Fixed submission:
import sys
sys.setrecursionlimit(10**6)
n, k = map(int, input().split())
a = list(map(int, input().split()))

length = [-1] * n
path = [-1, []]
route = []


def func(now, depth):
    global path, length, a, route
    route.append(now)
    if length[now] == -1:
        length[now] = depth
        func(a[now]-1, depth+1)
    else:
        path = [length[now], route[length[now]:depth]]


func(0, 0)

if (k < path[0]):
    print(route[k] + 1)
else:
    tmp = k - path[0]
    tmp %= len(path[1])
    print(path[1][tmp] + 1)
Buggy python submission (verdict: Time Limit Exceeded):
from collections import Counter

s = list(input())
ls = len(s)
T = [0] * (ls+1)
modL = [0]
cnt = 0

for i in range(0, ls):
    j = ls-i-1
    T[j] = T[j+1] + int(s[j]) * 10**(i)
    modL.append(T[j] % 2019)

ans = 0
modC = Counter(modL)
for c in modC.values():
    ans += c * (c - 1) // 2

print(ans)


Fixed submission:
from collections import Counter

s = list(input())
ls = len(s)
T = [0] * (ls+1)
modL = [0]
cnt = 0
pad = 1

for i in reversed(range(0, ls)):
    T[i] = T[i+1] + int(s[i]) * pad
    modL.append(T[i] % 2019)
    pad = pad * 10 % 2019

ans = 0
for c in Counter(modL).values():
    ans += c * (c - 1) // 2

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
from collections import Counter

s = list(input())
ls = len(s)
T = [0] * (ls+1)
modL = [0]
cnt = 0

for i in reversed(range(0, ls)):
    T[i] = T[i+1] + int(s[i]) * 10**(ls-i-1)
    modL.append(T[i] % 2019)

ans = 0
for c in Counter(modL).values():
    ans += c * (c - 1) // 2

print(ans)


Fixed submission:
from collections import Counter

s = list(input())
ls = len(s)
T = [0] * (ls+1)
modL = [0]
cnt = 0
pad = 1

for i in reversed(range(0, ls)):
    T[i] = T[i+1] + int(s[i]) * pad
    modL.append(T[i] % 2019)
    pad = pad * 10 % 2019

ans = 0
for c in Counter(modL).values():
    ans += c * (c - 1) // 2

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
from collections import Counter

s = list(input())
ls = len(s)
T = [0] * (ls+1)
modL = [0]
cnt = 0

for i in range(0, ls):
    T[i] = int("".join(s[i:ls]))
    modL.append(T[i] % 2019)

ans = 0
for c in Counter(modL).values():
    ans += c * (c - 1) // 2

print(ans)


Fixed submission:
from collections import Counter

s = list(input())
ls = len(s)
T = [0] * (ls+1)
modL = [0]
cnt = 0
pad = 1

for i in reversed(range(0, ls)):
    T[i] = T[i+1] + int(s[i]) * pad
    modL.append(T[i] % 2019)
    pad = pad * 10 % 2019

ans = 0
for c in Counter(modL).values():
    ans += c * (c - 1) // 2

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
from collections import Counter

s = list(input())
ls = len(s)
T = [0] * (ls+1)
modL = [0]
cnt = 0

for i in range(0, ls):
    T[i] = int("".join(s[i:ls]))
    modL.append(T[i] % 2019)

ans = 0
for c in Counter(modL).values():
    ans += c * (c - 1) // 2

print(ans)


Fixed submission:
from collections import Counter

s = list(input())
ls = len(s)
T = [0] * (ls+1)
modL = [0]
cnt = 0
pad = 1

for i in reversed(range(0, ls)):
    T[i] = T[i+1] + int(s[i]) * pad
    modL.append(T[i] % 2019)
    pad = pad * 10 % 2019

ans = 0
for c in Counter(modL).values():
    ans += c * (c - 1) // 2

print(ans)
Buggy python submission (verdict: Runtime Error):
h, w = map(int, input().split())
s = [input() for _ in range(h)]
INF = 10**9
dp = [[INF]*w for _ in range(h)]

dp[0][0] = 0 if s[0][0] == "." else 1

for i in range(w):
    for j in range(h):
        d, r = INF, INF

        if i != 0:
            r = dp[i - 1][j] + (s[i - 1][j] == "." and s[i][j] == "#")
        if j != 0:
            d = dp[i][j - 1] + (s[i][j - 1] == "." and s[i][j] == "#")

        dp[i][j] = min(r, d, dp[i][j])

print(dp[w-1][h-1])


Fixed submission:
h, w = map(int, input().split())
s = [input() for _ in range(h)]

INF = 10**9
dp = [[INF]*w for _ in range(h)]

dp[0][0] = 0 if s[0][0] == "." else 1

for i in range(h):
    for j in range(w):
        d, r = INF, INF

        if i != 0:
            d = dp[i - 1][j] + (s[i - 1][j] == "." and s[i][j] == "#")
        if j != 0:
            r = dp[i][j - 1] + (s[i][j - 1] == "." and s[i][j] == "#")

        dp[i][j] = min(r, d, dp[i][j])

print(dp[h-1][w-1])