Buggy python submission (verdict: Runtime Error):
N,T = map(int,input().split())
food = list(list(map(int,input().split()))for i in range(N))
ans = 0
if T == 1:
    for _,i in food:
        ans = max(i,ans)
    print(ans)
    exit()
DP = [[0]*(T) for i in range(N+1)]
for i in range(N):
    a,b = food[i]
    for j in range(a):
        DP[i+1][j] = DP[i][j]
    for j in range(a,T):
        DP[i+1][j] = max(DP[i][j],DP[i][j-a]+b)
ans = 0
i = N
j = T-1
while i > 0 and j > 0:
    if DP[i][j] == DP[i][j-1]:
        j -= 1
    elif DP[i][j] == DP[i-1][j]:
        i -= 1
    else:
        food[i-1][1] = 0
        j -= food[i-1][0]
        i -= 1
food.sort(reverse=True,key= lambda x:x[1])
print(DP[-1][-1]+food[0][1])

Fixed submission:
N,T = map(int,input().split())
food = list(list(map(int,input().split()))for i in range(N))
DP = [[0]*(T) for i in range(N+1)]
for i in range(N):
    a,b = food[i]
    for j in range(min(a,T)):
        DP[i+1][j] = DP[i][j]
    for j in range(a,T):
        DP[i+1][j] = max(DP[i][j],DP[i][j-a]+b)
ans = 0
i = N
j = T-1
while i > 0 and j > 0:
    if DP[i][j] == DP[i][j-1]:
        j -= 1
    elif DP[i][j] == DP[i-1][j]:
        i -= 1
    else:
        food[i-1][1] = 0
        j -= food[i-1][0]
        i -= 1
food.sort(reverse=True,key= lambda x:x[1])
print(DP[-1][-1]+food[0][1])

Buggy python submission (verdict: Runtime Error):
N,T = map(int,input().split())
food = list(list(map(int,input().split()))for i in range(N))
DP = [[0]*(T) for i in range(N+1)]
for i in range(N):
    a,b = food[i]
    for j in range(a):
        DP[i+1][j] = DP[i][j]
    for j in range(a,T):
        DP[i+1][j] = max(DP[i][j],DP[i][j-a]+b)
ans = 0
i = N
j = T-1
while i > 0 and j > 0:
    if DP[i][j] == DP[i][j-1]:
        j -= 1
    elif DP[i][j] == DP[i-1][j]:
        i -= 1
    else:
        food[i-1][1] = 0
        j -= food[i-1][0]
        i -= 1
food.sort(reverse=True,key= lambda x:x[1])
print(DP[-1][-1]+food[0][1])

Fixed submission:
N,T = map(int,input().split())
food = list(list(map(int,input().split()))for i in range(N))
DP = [[0]*(T) for i in range(N+1)]
for i in range(N):
    a,b = food[i]
    for j in range(min(a,T)):
        DP[i+1][j] = DP[i][j]
    for j in range(a,T):
        DP[i+1][j] = max(DP[i][j],DP[i][j-a]+b)
ans = 0
i = N
j = T-1
while i > 0 and j > 0:
    if DP[i][j] == DP[i][j-1]:
        j -= 1
    elif DP[i][j] == DP[i-1][j]:
        i -= 1
    else:
        food[i-1][1] = 0
        j -= food[i-1][0]
        i -= 1
food.sort(reverse=True,key= lambda x:x[1])
print(DP[-1][-1]+food[0][1])

Buggy python submission (verdict: Runtime Error):
N,T = map(int,input().split())
food = list(list(map(int,input().split()))for i in range(N))
DP = [[0]*(T) for i in range(N+1)]
for i in range(N):
    a,b = food[i]
    for j in range(a):
        DP[i+1][j] = DP[i][j]
    for j in range(a,T):
        DP[i+1][j] = max(DP[i][j],DP[i][j-a]+b)
ans = 0
i = N
j = T-1
while i > 0 and j > 0:
    if DP[i][j] == DP[i][j-1]:
        j -= 1
    elif DP[i][j] == DP[i-1][j]:
        i -= 1
    else:
        food[i-1][1] = 0
        i -= 1
        j -= food[i][0]
food.sort(reverse=True,key= lambda x:x[1])
print(DP[-1][-1]+food[0][1])

Fixed submission:
N,T = map(int,input().split())
food = list(list(map(int,input().split()))for i in range(N))
DP = [[0]*(T) for i in range(N+1)]
for i in range(N):
    a,b = food[i]
    for j in range(min(a,T)):
        DP[i+1][j] = DP[i][j]
    for j in range(a,T):
        DP[i+1][j] = max(DP[i][j],DP[i][j-a]+b)
ans = 0
i = N
j = T-1
while i > 0 and j > 0:
    if DP[i][j] == DP[i][j-1]:
        j -= 1
    elif DP[i][j] == DP[i-1][j]:
        i -= 1
    else:
        food[i-1][1] = 0
        j -= food[i-1][0]
        i -= 1
food.sort(reverse=True,key= lambda x:x[1])
print(DP[-1][-1]+food[0][1])