Harryxun/testdata huggingface dataset:
Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())

ans = set()


for i in range(n):
    s = input()
    if s in ans:
        ans = ans - {s}
    else:
        ans = ans | {s}

print(len(ans))


Fixed submission:
n = int(input())

ans = [input() for i in range(n)]

ans.sort()

s = sorted(set(ans))
t = 0
cnt = 0

result = 0
for i in range(n):
    temp = s[t]
    if ans[i] == temp:
        cnt += 1
    else:
        if cnt % 2 == 1:
            result += 1
        cnt = 1
        t += 1
else:
    if cnt % 2 == 1:
        result += 1
        
    
    

print(result)

Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())

ans = set()


for i in range(n):
    ans = ans ^ {input()}

print(len(ans))


Fixed submission:
n = int(input())

ans = [input() for i in range(n)]

ans.sort()

s = sorted(set(ans))
t = 0
cnt = 0

result = 0
for i in range(n):
    temp = s[t]
    if ans[i] == temp:
        cnt += 1
    else:
        if cnt % 2 == 1:
            result += 1
        cnt = 1
        t += 1
else:
    if cnt % 2 == 1:
        result += 1
        
    
    

print(result)

Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())

ans = set()


for i in range(n):
    ans = ans ^ set([input()])

print(len(ans))


Fixed submission:
n = int(input())

ans = [input() for i in range(n)]

ans.sort()

s = sorted(set(ans))
t = 0
cnt = 0

result = 0
for i in range(n):
    temp = s[t]
    if ans[i] == temp:
        cnt += 1
    else:
        if cnt % 2 == 1:
            result += 1
        cnt = 1
        t += 1
else:
    if cnt % 2 == 1:
        result += 1
        
    
    

print(result)

Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())

ans = set()
s = []


for i in range(n):
    s = [(input())]
    ans = ans ^ set(s)

print(len(ans))


Fixed submission:
n = int(input())

ans = [input() for i in range(n)]

ans.sort()

s = sorted(set(ans))
t = 0
cnt = 0

result = 0
for i in range(n):
    temp = s[t]
    if ans[i] == temp:
        cnt += 1
    else:
        if cnt % 2 == 1:
            result += 1
        cnt = 1
        t += 1
else:
    if cnt % 2 == 1:
        result += 1
        
    
    

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

a_li.sort()

ans = 0

a_set = set(a_li)

check = [0] * (a_li[-1]+2)
for i in range(a_li[-1]+1):
    check[i] = a_li.count(i)

for i in a_set:
    s = check[i] + check[i-1] + check[i+1]
    
    ans = max(ans,s)

print(ans)

Fixed submission:
from collections import defaultdict

n = int(input())
a_li = list(map(int,input().split()))

a_li.sort()
a_count = defaultdict(int)
for x in a_li:
    a_count[x] += 1

ans = 0

a_set = set(a_li)

for i in a_set:
    s = a_count[i] + a_count[i-1] + a_count[i+1]
    ans = max(ans,s)

print(ans)

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

ans = 0

a_set = set(a_li)

for i in a_set:
    s = a_li.count(i)
    s += a_li.count(i-1)
    s += a_li.count(i+1)
    
    ans = max(ans,s)

print(ans)

Fixed submission:
from collections import defaultdict

n = int(input())
a_li = list(map(int,input().split()))

a_li.sort()
a_count = defaultdict(int)
for x in a_li:
    a_count[x] += 1

ans = 0

a_set = set(a_li)

for i in a_set:
    s = a_count[i] + a_count[i-1] + a_count[i+1]
    ans = max(ans,s)

print(ans)

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

ans = 0

a_set = set(a_li)

for i in a_set:
    s = a_li.count(i)
    s += a_li.count(i-1)
    s += a_li.count(i+1)
    
    ans = max(ans,s)

print(ans)

Fixed submission:
from collections import defaultdict

n = int(input())
a_li = list(map(int,input().split()))

a_li.sort()
a_count = defaultdict(int)
for x in a_li:
    a_count[x] += 1

ans = 0

a_set = set(a_li)

for i in a_set:
    s = a_count[i] + a_count[i-1] + a_count[i+1]
    ans = max(ans,s)

print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
import sys

n,m = map(int,input().split())

li1 = []
li2 = []

for i in range(m):
    s = list(input().split())
    if "1" in s:
        li1.append(s)
    elif str(n) in s:
        li2.append(s)
        
for i in range(len(li1)):
    for j in range(len(li2)):
        x = set(li1[i]) | set(li2[j])
        if len(x) == 3:
            print("POSSIBLE")
            sys.exit()
    

print("IMPOSSIBLE")



Fixed submission:
N, M = map(int,input().split())

sa = set()
sb = set()

for i in range(M):
    a,b = map(int,input().split())
    if a==1 : sb.add(b)
    if b == N : sa.add(a)
    
print("IMPOSSIBLE" if len(sa&sb) == 0 else "POSSIBLE")

Buggy python submission (verdict: Time Limit Exceeded):
import sys

n,m = map(int,input().split())

li = [list(map(int,input().split())) for i in range(m)]

for i in range(m-1):
    for j in range(i+1,m):
        s = set(li[i]) | set(li[j])
        if 1 in s and n in s and len(s) == 3:
            print("POSSIBLE")
            sys.exit()
print("IMPOSSIBLE")


Fixed submission:
N, M = map(int,input().split())

sa = set()
sb = set()

for i in range(M):
    a,b = map(int,input().split())
    if a==1 : sb.add(b)
    if b == N : sa.add(a)
    
print("IMPOSSIBLE" if len(sa&sb) == 0 else "POSSIBLE")
Buggy python submission (verdict: Runtime Error):
import sys

sys.stdin = open('test.txt')

n = int(input())
li = list(map(int, input().split()))

all_sum = sum(li)
x = 0
y = all_sum
ans = 10**18

for i in range(n):
    x += li[i]
    y -= li[i]

    if ans >= abs(x-y):
        ans = abs(x-y)

    if i == n - 2:
        break

print(ans)

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

all_sum = sum(li)
x = 0
y = all_sum
ans = 10**18

for i in range(n):
    x += li[i]
    y -= li[i]

    if ans >= abs(x-y):
        ans = abs(x-y)

    if i == n - 2:
        break

print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())

li = []

for i in range(n):
    li.append(int(input()))

check_li = [1]
s = 1
cnt = 0

while True:
    cnt += 1
    s = li[s-1]
    if s in check_li:
        print(-1)
        break
    if s == 2:
        print(cnt)
        break
    check_li.append(s)
    
    

Fixed submission:
n = int(input())

li = [int(input()) for _ in range(n)]

check_li = [1]
s = 1
cnt = 0

while True:
    cnt += 1
    s = li[s-1]
    if cnt >= n:
        print(-1)
        break
    if s == 2:
        print(cnt)
        break
Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())

li = list(map(int,input().split()))

ans = 0
cnt = 0
s = 0

for i in range(n):
    if i == 0:
        ans += li[i]
        if ans > 0:
            s = 1
        else:
            s = -1
    else:
        ans += li[i]
        if ans <= 0 and s == -1:
            while True:
                ans += 1
                cnt += 1
                if ans > 0:
                    s == 1
                    break
        if ans >= 0 and s == 1:
            while True:
                ans -= 1
                cnt += 1
                if ans < 0:
                    s == -1
                    break
        s *= -1

print(cnt)

Fixed submission:
n = int(input())

li = list(map(int,input().split()))

ans = 0
cnt = 0

s = 1
for i in range(n):
    ans += li[i]
    if ans <= 0 and s == -1:
        cnt += abs(ans) + 1
        ans = 1
    if ans >= 0 and s == 1:
        cnt += abs(ans) + 1
        ans = -1
    s *= -1
    
res1 = cnt


ans = 0
cnt = 0

    
s = -1
for i in range(n):
    ans += li[i]
    if ans <= 0 and s == -1:
        cnt += abs(ans) + 1
        ans = 1
    if ans >= 0 and s == 1:
        cnt += abs(ans) + 1
        ans = -1
    s *= -1
    
res2 = cnt

print(min(res1,res2))
Buggy python submission (verdict: Runtime Error):
n,m = map(int,input().split())
li_a = [list(input()) for _ in range(n)]
li_b = [list(input()) for _ in range(m)]


for i in range(n-m+1):
    for j in range(n-m+1):
        for k in range(m):
            if li_a[i+x][j:j+m] != li_b[x][:]:
                break
        else:
            print("Yes")
            exit()
            
print("No")

Fixed submission:
n,m = map(int,input().split())
li_a = [list(input()) for _ in range(n)]
li_b = [list(input()) for _ in range(m)]


for i in range(n-m+1):
    for j in range(n-m+1):
        for k in range(m):
            if li_a[i+k][j:j+m] != li_b[k][:]:
                break
        else:
            print("Yes")
            exit()
            
print("No")
Buggy python submission (verdict: Runtime Error):
sys.stdin = open('../ABC/test.txt')

x, y = map(int, input().split())

ans = 10**18

if y - x >= 0:
    ans = min(ans, y-x)

x *= -1

if y - x >= 0:
    ans = min(ans, y-x)

x *= -1
y *= -1

if y - x >= 0:
    ans = min(ans, y-x)

x *= -1

if y -x >= 0:
    ans = min(ans, y-x)

print(ans)

Fixed submission:
x, y = map(int, input().split())

ans = 0

if x >= 0 and y >= 0:
    if y >= x:
        ans = y - x
    else:
        ans = abs(y-x) + 2
elif x >= 0 and y < 0:
    ans = abs(abs(y)-abs(x)) + 1

elif x < 0 and y >= 0:
    ans = abs(abs(y)-abs(x)) + 1

else:
    if y >= x:
        ans = abs(y-x)
    else:
        ans = abs(y-x) + 2

if y == 0:
    ans -= 1

print(ans)
Buggy python submission (verdict: Time Limit Exceeded):

import itertools
x = 10**9 + 7
n = int(input())
a = list(map(lambda i: i % x , map(int, input().split(" "))))

ans = 0
for i in range(n):
    for j in range(i + 1, n):
        ans += (a[i] * a[j]) % x
print(ans % x)

Fixed submission:
import itertools
x = 10**9 + 7
n = int(input())
a = list(map(lambda i: i % x , map(int, input().split(" "))))
sum_a = []
prev = 0
for i in a:
    sum_a.append(prev + i)
    prev = prev + i

ans = 0
for i in range(n):
    ans += (a[i] * (sum_a[n-1] - sum_a[i] )) % x
print(ans % x)

Buggy python submission (verdict: Time Limit Exceeded):
import itertools
x = 10**9 + 7
n = int(input())
a = list(map(lambda i: i % x , map(int, input().split(" "))))

ans = 0
for i, j in itertools.combinations(range(n), 2):
    ans += (a[i] * a[j]) % x
print(ans % x)

Fixed submission:
import itertools
x = 10**9 + 7
n = int(input())
a = list(map(lambda i: i % x , map(int, input().split(" "))))
sum_a = []
prev = 0
for i in a:
    sum_a.append(prev + i)
    prev = prev + i

ans = 0
for i in range(n):
    ans += (a[i] * (sum_a[n-1] - sum_a[i] )) % x
print(ans % x)

Buggy python submission (verdict: Time Limit Exceeded):
import itertools
x = 10**9 + 7
n = int(input())
a = list(map(lambda i: i % x , map(int, input().split(" "))))

ans = 0
for i, j in itertools.combinations(range(n), 2):
    ans += (a[i] * a[j]) % x

print(ans % x)

Fixed submission:
import itertools
x = 10**9 + 7
n = int(input())
a = list(map(lambda i: i % x , map(int, input().split(" "))))
sum_a = []
prev = 0
for i in a:
    sum_a.append(prev + i)
    prev = prev + i

ans = 0
for i in range(n):
    ans += (a[i] * (sum_a[n-1] - sum_a[i] )) % x
print(ans % x)

Buggy python submission (verdict: Time Limit Exceeded):


import itertools
n = int(input())
a = list(map(int, input().split(" ")))

ans = 0
for i, j in itertools.combinations(range(n), 2):
    ans += (a[i] * a[j]) % (10**9+7)

print(ans % (10**9 + 7))

Fixed submission:
import itertools
x = 10**9 + 7
n = int(input())
a = list(map(lambda i: i % x , map(int, input().split(" "))))
sum_a = []
prev = 0
for i in a:
    sum_a.append(prev + i)
    prev = prev + i

ans = 0
for i in range(n):
    ans += (a[i] * (sum_a[n-1] - sum_a[i] )) % x
print(ans % x)

Buggy python submission (verdict: Time Limit Exceeded):

import itertools
n = int(input())
a = list(map(int, input().split(" ")))

ans = 0
for i, j in itertools.combinations(range(n), 2):
    ans += (a[i] * a[j]) % (10**9+7)

print(ans % (10**9 + 7))

Fixed submission:
import itertools
x = 10**9 + 7
n = int(input())
a = list(map(lambda i: i % x , map(int, input().split(" "))))
sum_a = []
prev = 0
for i in a:
    sum_a.append(prev + i)
    prev = prev + i

ans = 0
for i in range(n):
    ans += (a[i] * (sum_a[n-1] - sum_a[i] )) % x
print(ans % x)
Buggy python submission (verdict: Runtime Error):
import collections

class UnionFindBasic():
    def __init__(self, n):
        self.parents = list(range(n))

    def find(self, x):
        if self.parents[x] == x:
            return x
        else:
            return self.find(self.parents[x])

    def union(self, x, y):
        x = self.find(x)
        y = self.find(y)

        if x == y:
            return

        self.parents[y] = x

n, m = map(int, input().split(" "))
ufb = UnionFindBasic(n)

for i in range(m):
    a, b = map(int, input().split(" "))
    ufb.union(a- 1 , b - 1)

c = collections.Counter([ufb.find(i) for i in range(n)])
print(max(c.values()))

Fixed submission:

import collections

class UnionFind():
    def __init__(self, n):
        self.n = n
        self.parents = [-1] * n

    def find(self, x):
        if self.parents[x] < 0:
            return x
        else:
            self.parents[x] = self.find(self.parents[x])
            return self.parents[x]

    def union(self, x, y):
        x = self.find(x)
        y = self.find(y)

        if x == y:
            return

        if self.parents[x] > self.parents[y]:
            x, y = y, x

        self.parents[x] += self.parents[y]
        self.parents[y] = x

    def size(self, x):
        return -self.parents[self.find(x)]

    def same(self, x, y):
        return self.find(x) == self.find(y)

    def members(self, x):
        root = self.find(x)
        return [i for i in range(self.n) if self.find(i) == root]

    def roots(self):
        return [i for i, x in enumerate(self.parents) if x < 0]

    def group_count(self):
        return len(self.roots())

    def all_group_members(self):
        return {r: self.members(r) for r in self.roots()}

    def __str__(self):
        return '\n'.join('{}: {}'.format(r, self.members(r)) for r in self.roots())
n, m = map(int, input().split(" "))
ufb = UnionFind(n)

for i in range(m):
    a, b = map(int, input().split(" "))
    ufb.union(a- 1 , b - 1)

c = collections.Counter([ufb.find(i) for i in range(n)])
print(max(c.values()))
Buggy python submission (verdict: Time Limit Exceeded):


import collections

n = int(input())
a = list(map(int, input().split(" ")))
q = int(input())
have_map = collections.Counter(a)
for i in range(q):
    x, y = map(int, input().split(" "))
    have_map[y] = have_map.get(x, 0) + have_map.get(y, 0)
    have_map.pop(x, 0)

    cost = 0
    for k,v in have_map.items():
        cost += k * v
    print(cost)


Fixed submission:


import collections

n = int(input())
a = list(map(int, input().split(" ")))
q = int(input())
have_map = collections.Counter(a)

total_cost = 0
for k,v in have_map.items():
    total_cost += k * v

for i in range(q):
    x, y = map(int, input().split(" "))
    if x in have_map:
        diff = have_map[x] * -x  + have_map[x] * y
        total_cost += diff

    have_map[y] = have_map.get(x, 0) + have_map.get(y, 0)
    have_map.pop(x, 0)

    print(total_cost)

Buggy python submission (verdict: Runtime Error):


import collections

n = int(input())
a = list(map(int, input().split(" ")))
q = int(input())
have_map = collections.Counter(a)
cost_map = { k:k for k in have_map.keys() }
for i in range(q):
    x, y = map(int, input().split(" "))
    have_map[y] = have_map.get(x, 0) + have_map.get(y, 0)
    have_map.pop(x, 0)

    cost = 0
    for k,v in have_map.items():
        cost += cost_map[k] * v
    print(cost)


Fixed submission:


import collections

n = int(input())
a = list(map(int, input().split(" ")))
q = int(input())
have_map = collections.Counter(a)

total_cost = 0
for k,v in have_map.items():
    total_cost += k * v

for i in range(q):
    x, y = map(int, input().split(" "))
    if x in have_map:
        diff = have_map[x] * -x  + have_map[x] * y
        total_cost += diff

    have_map[y] = have_map.get(x, 0) + have_map.get(y, 0)
    have_map.pop(x, 0)

    print(total_cost)
Buggy python submission (verdict: Time Limit Exceeded):
import functools
_ = input()
l = list(map(int, input().split(" ")))

ans = functools.reduce(lambda x, y : x* y, l, 1)

if ans > 10**18:
    print(-1)
else:
    print(ans)

Fixed submission:

import sys
_ = input()
l = list(map(int, input().split(" ")))

if 0 in l:
    print(0)
    sys.exit()

ans = 1
for i in l:
    ans *= i
    if ans > 10 **18:
        print(-1)
        sys.exit()

print(ans)

Buggy python submission (verdict: Runtime Error):
_ = input()
l = list(map(int, input().split(" ")))

ans = functools.reduce(lambda x, y : x* y, l, 1)

if ans > 10**18:
    print(-1)
else:
    print(ans)

Fixed submission:

import sys
_ = input()
l = list(map(int, input().split(" ")))

if 0 in l:
    print(0)
    sys.exit()

ans = 1
for i in l:
    ans *= i
    if ans > 10 **18:
        print(-1)
        sys.exit()

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

candidates = {}
for i in range(m):
    x, y = map(int, input().split(" "))

    if h[x - 1] <= h[y -1]:
        candidates[x] = False
    if h[x - 1] >= h[y -1]:
        candidates[y] = False
    print(x, y , candidates)

ans = 0
for i in range(1, n + 1):
    is_highest = candidates.get(i, True)
    if is_highest:
        ans += 1

print(ans)

Fixed submission:
n, m = map(int ,input().split(" "))
h = list(map(int, input().split(" ")))

candidates = {}
for i in range(m):
    x, y = map(int, input().split(" "))

    if h[x - 1] <= h[y -1]:
        candidates[x] = False
    if h[x - 1] >= h[y -1]:
        candidates[y] = False

ans = 0
for i in range(1, n + 1):
    is_highest = candidates.get(i, True)
    if is_highest:
        ans += 1

print(ans)
Buggy python submission (verdict: Time Limit Exceeded):

X = int(input())

def gen_divisor(x):
    for i in range(x, 0, -1):
        if x % i == 0:
            yield i

def gen_candidates(divisor):
    a = -119
    while True:
        a = a + 1
        b = a - divisor
        tmp = a**5 - b**5
        if  tmp == X:
            yield (a, b)
        if a >= 120:
            break


for divisor in gen_divisor(X):
    for a, b in gen_candidates(divisor):
        print(a,b)
        break
    else:
        continue
    break

Fixed submission:
X = int(input())

for a in range(-119,119):
    for b in range(-119,119):
        if a**5 - b**5 == X:
            print(a,b)
            break
    else:
        continue
    break

Buggy python submission (verdict: Time Limit Exceeded):
x = int(input())

def gen_divisor(x):
    for i in range(1, x + 1):
        if x % i == 0:
            yield i

def gen_candidates(limit, divisor):
    for a in range(limit):
        yield (a, a - divisor)


for divisor in gen_divisor(x):
    for a, b in gen_candidates(x + 1, divisor):
        if a**5 - b**5 == x:
            print(a, b)
            break
    else:
        continue
    break

Fixed submission:
X = int(input())

for a in range(-119,119):
    for b in range(-119,119):
        if a**5 - b**5 == X:
            print(a,b)
            break
    else:
        continue
    break

Buggy python submission (verdict: Time Limit Exceeded):
x = int(input())

def gen_divisor(x):
    for i in range(1, x + 1):
        if x % i == 0:
            yield i

def gen_candidates(limit, divisor):
    for a in range(limit):
        yield (a, a - divisor)


for divisor in gen_divisor(x):
    for a, b in gen_candidates(x + 1, divisor):
        if a**5 - b**5 == x:
            print(a, b)
            break
    else:
        continue
    break


Fixed submission:
X = int(input())

for a in range(-119,119):
    for b in range(-119,119):
        if a**5 - b**5 == X:
            print(a,b)
            break
    else:
        continue
    break
Buggy python submission (verdict: Time Limit Exceeded):
import math

a, b, n = map(int, input().split(" "))

print(max([math.floor(a*i / b) - a * math.floor(i / b)  for i in range(1, b + 1 if b < n else n + 1)]))

Fixed submission:
import math
 
a, b, n = map(int, input().split(" "))
i = min([b-1 , n])
print( math.floor(a*i / b) - a * math.floor(i / b) )

Buggy python submission (verdict: Time Limit Exceeded):
import math
 
a, b, n = map(int, input().split(" "))
 
print(max([math.floor(a * i / b) - a * math.floor(i / b) for i in range(1, n + 1)]))

Fixed submission:
import math
 
a, b, n = map(int, input().split(" "))
i = min([b-1 , n])
print( math.floor(a*i / b) - a * math.floor(i / b) )

Buggy python submission (verdict: Time Limit Exceeded):
import math

a, b, n = map(int, input().split(" "))

print(max([math.floor(a * i / b) - a * math.floor(i / b) for i in range(1, n + 1)]))


Fixed submission:
import math
 
a, b, n = map(int, input().split(" "))
i = min([b-1 , n])
print( math.floor(a*i / b) - a * math.floor(i / b) )

Buggy python submission (verdict: Runtime Error):
a, b, n = map(int, input().split(" "))

print(max([math.floor(a * i / b) - a * math.floor(i / b) for i in range(1, n + 1)]))


Fixed submission:
import math
 
a, b, n = map(int, input().split(" "))
i = min([b-1 , n])
print( math.floor(a*i / b) - a * math.floor(i / b) )
Buggy python submission (verdict: Runtime Error):
s, w = list(map(int, input().split(" ")))
if s >= w:
  print("unsafe")
else:
  print("safe)

Fixed submission:
s, w = list(map(int, input().split(" ")))
if s <= w:
  print("unsafe")
else:
  print("safe")

Buggy python submission (verdict: Runtime Error):
 w = list(map(int, input().split(" ")))
if s >= w:
  print("unsafe")
else:
  print("safe")

Fixed submission:
s, w = list(map(int, input().split(" ")))
if s <= w:
  print("unsafe")
else:
  print("safe")

Buggy python submission (verdict: Runtime Error):
s, w = list(map(int, input().split(" ")))
if s >= w:
  print("unsafe")
else:
  print("safe)

Fixed submission:
s, w = list(map(int, input().split(" ")))
if s <= w:
  print("unsafe")
else:
  print("safe")
Buggy python submission (verdict: Runtime Error):
import itertools
 
n, m = list(map(int, input().split(" ")))
l = [ i for i in range(n + 1) ]
 
print(l[n:m] -  [0:n] )


Fixed submission:
n, k = map(int, input().split(" "))

ans = 0
for i in range(k, n+2):
    min = i * ( 0 + i-1) / 2
    max = i * ( (n+1 - i) + n) / 2
    ans += int(max - min + 1)

print(ans % (10**9 + 7))

Buggy python submission (verdict: Runtime Error):
import itertools
 
n, m = list(map(int, input().split(" ")))
l = [ i for i in range(n + 1) ]
 
ans = 0
for i in range(m, n + 2):
    ans = ans + len(itertools.combinations(l, i))
print(ans)

Fixed submission:
n, k = map(int, input().split(" "))

ans = 0
for i in range(k, n+2):
    min = i * ( 0 + i-1) / 2
    max = i * ( (n+1 - i) + n) / 2
    ans += int(max - min + 1)

print(ans % (10**9 + 7))

Buggy python submission (verdict: Time Limit Exceeded):
import itertools

n, m = list(map(int, input().split(" ")))
l = [ 10**100 + i for i in range(n + 1) ]
div = 10**9 + 7

ans = set()
for i in range(m, n + 2):
    for v in itertools.combinations(l, i):
        ans.add(sum(v) % div)
print(len(ans))

Fixed submission:
n, k = map(int, input().split(" "))

ans = 0
for i in range(k, n+2):
    min = i * ( 0 + i-1) / 2
    max = i * ( (n+1 - i) + n) / 2
    ans += int(max - min + 1)

print(ans % (10**9 + 7))