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

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = np.array([])
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(a_dash)
	b.append(b_dash)

c = zip(a,b)
c = sorted(c)
a,b = zip(*c)
#a = list(a)
#b = list(b)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if a[j] + i == m:
			l = np.append(l,b[j])
			count += 1
		else:
			break
	if l.shape[0] != 0:
		maximum = np.max(l)
		maximum_index = np.argmax(l)
		ans += maximum
		l = np.delete(l,maximum_index)

print(int(ans))


Fixed submission:
import sys
import heapq

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(-a_dash)
	b.append(-b_dash)

c = zip(a,b)
c = sorted(c,reverse=True)
a,b = zip(*c)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if -a[j] + i == m:
			heapq.heappush(l,b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = heapq.heappop(l)
		ans += maximum

print(-ans)

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

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = np.array([])
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(a_dash)
	b.append(b_dash)

c = zip(a,b)
c = sorted(c)
a,b = zip(*c)
#a = list(a)
#b = list(b)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if a[j] + i == m:
			l = np.append(l,b[j])
			count += 1
		else:
			break
	print(l)
	if l.shape[0] != 0:
		maximum = np.max(l)
		maximum_index = np.argmax(l)
		ans += maximum
		l = np.delete(l,maximum_index)

print(int(ans))


Fixed submission:
import sys
import heapq

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(-a_dash)
	b.append(-b_dash)

c = zip(a,b)
c = sorted(c,reverse=True)
a,b = zip(*c)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if -a[j] + i == m:
			heapq.heappush(l,b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = heapq.heappop(l)
		ans += maximum

print(-ans)

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

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(a_dash)
	b.append(b_dash)

c = zip(a,b)
c = sorted(c)
a,b = zip(*c)
#a = list(a)
#b = list(b)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if a[j] + i == m:
			l.append(b[j])
			count += 1
		else:
			break

	if len(l) != 0:
		maximum = max(l)
		ans += maximum
		l.pop(l.index(maximum))

print(ans)


Fixed submission:
import sys
import heapq

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(-a_dash)
	b.append(-b_dash)

c = zip(a,b)
c = sorted(c,reverse=True)
a,b = zip(*c)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if -a[j] + i == m:
			heapq.heappush(l,b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = heapq.heappop(l)
		ans += maximum

print(-ans)

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

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(a_dash)
	b.append(b_dash)

c = zip(a,b)
c = sorted(c)
a,b = zip(*c)
a = list(a)
b = list(b)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if a[j] + i == m:
			l.append(b[j])
			count += 1
		else:
			break

	if len(l) != 0:
		maximum = max(l)
		ans += maximum
		l.pop(l.index(maximum))

print(ans)


Fixed submission:
import sys
import heapq

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(-a_dash)
	b.append(-b_dash)

c = zip(a,b)
c = sorted(c,reverse=True)
a,b = zip(*c)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if -a[j] + i == m:
			heapq.heappush(l,b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = heapq.heappop(l)
		ans += maximum

print(-ans)

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(n):
	a_dash,b_dash = map(int,input().split())
	a.append(a_dash)
	b.append(b_dash)

c = zip(a,b)
c = sorted(c)
a,b = zip(*c)
a = list(a)
b = list(b)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if a[j] + i == m:
			l.append(b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = max(l)
		ans += maximum
		l.pop(l.index(maximum))

print(ans)


Fixed submission:
import sys
import heapq

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(-a_dash)
	b.append(-b_dash)

c = zip(a,b)
c = sorted(c,reverse=True)
a,b = zip(*c)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if -a[j] + i == m:
			heapq.heappush(l,b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = heapq.heappop(l)
		ans += maximum

print(-ans)

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(n):
	a_dash,b_dash = map(int,input().split())
	a.append(a_dash)
	b.append(b_dash)

c = zip(a,b)
c = sorted(c)
a,b = zip(*c)
a = list(a)
b = list(b)

for i in reversed(range(m)):
	for j in range(count,len(a)):
		if a[j] + i == m:
			l.append(b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = max(l)
		ans += maximum
		l.pop(l.index(maximum))

print(ans)


Fixed submission:
import sys
import heapq

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(-a_dash)
	b.append(-b_dash)

c = zip(a,b)
c = sorted(c,reverse=True)
a,b = zip(*c)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if -a[j] + i == m:
			heapq.heappush(l,b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = heapq.heappop(l)
		ans += maximum

print(-ans)

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(n):
	a_dash,b_dash = map(int,input().split())
	a.append(a_dash)
	b.append(b_dash)

c = zip(a,b)
c = sorted(c)
a,b = zip(*c)
a = list(a)
b = list(b)

for i in reversed(range(m)):
	for j in range(count,len(a)):
		if a[j] + i == m:
			l.append(b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		ans += max(l)
		l.pop(l.index(max(l)))

print(ans)


Fixed submission:
import sys
import heapq

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(-a_dash)
	b.append(-b_dash)

c = zip(a,b)
c = sorted(c,reverse=True)
a,b = zip(*c)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if -a[j] + i == m:
			heapq.heappush(l,b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = heapq.heappop(l)
		ans += maximum

print(-ans)

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(n):
	a_dash,b_dash = map(int,input().split())
	a.append(a_dash)
	b.append(b_dash)

c = zip(a,b)
c = sorted(c)
a,b = zip(*c)
a = list(a)
b = list(b)

for i in reversed(range(m)):
	for j in range(count,count+a.count(m-i)):
		if a[j] + i == m:
			l.append(b[j])
			count += 1

	if len(l) != 0:
		ans += max(l)
		l.pop(l.index(max(l)))

print(ans)

Fixed submission:
import sys
import heapq

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(-a_dash)
	b.append(-b_dash)

c = zip(a,b)
c = sorted(c,reverse=True)
a,b = zip(*c)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if -a[j] + i == m:
			heapq.heappush(l,b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = heapq.heappop(l)
		ans += maximum

print(-ans)

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(n):
	a_dash,b_dash = map(int,input().split())
	a.append(a_dash)
	b.append(b_dash)

c = zip(a,b)
c = sorted(c)
a,b = zip(*c)
a = list(a)
b = list(b)

for i in reversed(range(m)):
	l_dash = [ b[j] for j in range(count,count+a.count(m-i)) if a[j]+i==m ]
	l.extend(l_dash)
	count += len(l_dash)
	if len(l) != 0:
		ans += max(l)
		l.pop(l.index(max(l)))

print(ans)

Fixed submission:
import sys
import heapq

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(-a_dash)
	b.append(-b_dash)

c = zip(a,b)
c = sorted(c,reverse=True)
a,b = zip(*c)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if -a[j] + i == m:
			heapq.heappush(l,b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = heapq.heappop(l)
		ans += maximum

print(-ans)

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(n):
	a_dash,b_dash = map(int,input().split())
	a.append(a_dash)
	b.append(b_dash)

c = zip(a,b)
c = sorted(c)
a,b = zip(*c)
a = list(a)
b = list(b)

for i in reversed(range(m)):
	l_dash = [ b[j] for j in range(count,len(a)) if a[j]+i==m ]
	l.extend(l_dash)
	count += len(l_dash)
	if len(l) != 0:
		ans += max(l)
		l.pop(l.index(max(l)))

print(ans)

Fixed submission:
import sys
import heapq

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(-a_dash)
	b.append(-b_dash)

c = zip(a,b)
c = sorted(c,reverse=True)
a,b = zip(*c)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if -a[j] + i == m:
			heapq.heappush(l,b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = heapq.heappop(l)
		ans += maximum

print(-ans)

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(n):
	a_dash,b_dash = map(int,input().split())
	a.append(a_dash)
	b.append(b_dash)

c = zip(a,b)
c = sorted(c)
a,b = zip(*c)
a = list(a)
b = list(b)

for i in reversed(range(m)):
	for j in range(count,len(a)):
		if a[j] + i == m:
			l.append(b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		ans += max(l)
		l.pop(l.index(max(l)))

print(ans)

Fixed submission:
import sys
import heapq

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(-a_dash)
	b.append(-b_dash)

c = zip(a,b)
c = sorted(c,reverse=True)
a,b = zip(*c)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if -a[j] + i == m:
			heapq.heappush(l,b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = heapq.heappop(l)
		ans += maximum

print(-ans)

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(n):
	a_dash,b_dash = map(int,input().split())
	a.append(a_dash)
	b.append(b_dash)

c = zip(a,b)
c = sorted(c)
a,b = zip(*c)
a = list(a)
b = list(b)

for i in reversed(range(m)):
	for j in range(count,len(a)):
		if a[j] + i <= m:
			l.append(b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		ans += max(l)
		l.pop(l.index(max(l)))

print(ans)

Fixed submission:
import sys
import heapq

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(-a_dash)
	b.append(-b_dash)

c = zip(a,b)
c = sorted(c,reverse=True)
a,b = zip(*c)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if -a[j] + i == m:
			heapq.heappush(l,b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = heapq.heappop(l)
		ans += maximum

print(-ans)

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(n):
	a_dash,b_dash = map(int,input().split())
	a.append(a_dash)
	b.append(b_dash)

c = zip(a,b)
c = sorted(c)
a,b = zip(*c)
a = list(a)
b = list(b)

for i in reversed(range(m)):
	for j in range(count,len(a)):
		if a[j] + i == m:
			l.append(b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		ans += max(l)
		#index = b.index(max(l))
		#a.pop(index)
		#b.pop(index)
		l.pop(l.index(max(l)))
	#l.clear()

print(ans)

Fixed submission:
import sys
import heapq

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(-a_dash)
	b.append(-b_dash)

c = zip(a,b)
c = sorted(c,reverse=True)
a,b = zip(*c)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if -a[j] + i == m:
			heapq.heappush(l,b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = heapq.heappop(l)
		ans += maximum

print(-ans)

Buggy python submission (verdict: Runtime Error):
n,m = map(int,input().split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(n):
	a_dash,b_dash = map(int,input().split())
	a.append(a_dash)
	b.append(b_dash)

c = zip(a,b)
c = sorted(c)
a,b = zip(*c)
a = list(a)
b = list(b)

for i in reversed(range(m)):
	for j in range(count,len(a)):
		count += 1
		if a[j] + i == m:
			l.append(b[j])
		else:
			break
	print(l)
	if len(l) != 0:
		ans += max(l)
		index = b.index(max(l))
		#a.pop(index)
		#b.pop(index)
		l.pop(l.index(max(l)))
	print(a)
	print(b)
	#l.clear()

print(ans)

Fixed submission:
import sys
import heapq

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(-a_dash)
	b.append(-b_dash)

c = zip(a,b)
c = sorted(c,reverse=True)
a,b = zip(*c)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if -a[j] + i == m:
			heapq.heappush(l,b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = heapq.heappop(l)
		ans += maximum

print(-ans)

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int,input().split())
a = []
b = []
c = 0
l = []
ans = 0

for i in range(n):
	a_dash,b_dash = map(int,input().split())
	a.append(a_dash)
	b.append(b_dash)

for i in reversed(range(m)):
	for j in range(n-c):
		if a[j] + i <= m:
			l.append(b[j])
	if len(l) != 0:
		ans += max(l)
		index = b.index(max(l))
		a.pop(index)
		b.pop(index)
		c += 1
	l.clear()

print(ans)

Fixed submission:
import sys
import heapq

s = sys.stdin.readlines()
n,m = map(int,s[0].split())
a = []
b = []
l = []
ans = 0
count = 0

for i in range(1,n+1):
	a_dash,b_dash = map(int,s[i].split())
	a.append(-a_dash)
	b.append(-b_dash)

c = zip(a,b)
c = sorted(c,reverse=True)
a,b = zip(*c)
a_length = len(a)

for i in reversed(range(m)):
	for j in range(count,a_length):
		if -a[j] + i == m:
			heapq.heappush(l,b[j])
			count += 1
		else:
			break
	if len(l) != 0:
		maximum = heapq.heappop(l)
		ans += maximum

print(-ans)