Buggy python submission (verdict: Runtime Error):
import math
A,B = list(map(int,input().split()))
s =""
for i in range(int(math.log2(B))+1):
    if i == 0:
        a =0
        for j in range(A,4*(divmod(A,4)[0]+1)):
            #print(divmod(j,2)[1])
            a += divmod(j,2)[1]
        for j in range(4*(divmod(B,4)[0]),B+1):
            #print(divmod(j,2)[1])
            a += divmod(j,2)[1]
        s = str(divmod(a,2)[1])
    else:
        # int(divmod(16/16 ,2)[1])
        s = str(divmod((2**i-divmod(A,2**i)[1]) * int(divmod(A/2**i ,2)[1])+(divmod(B,2**i)[1]+1) * int(divmod(B/2**i ,2)[1]),2)[1]) + s
print(int(s,2))

Fixed submission:
import math
A,B = list(map(int,input().split()))
s =""
if B == 0:
    print(0)
else:
    for i in range(int(math.log2(B))+1):
        if i == 0:
            a =0
            for j in range(A,4*(divmod(A,4)[0]+1)):
                #print(divmod(j,2)[1])
                a += divmod(j,2)[1]
            for j in range(4*(divmod(B,4)[0]),B+1):
                #print(divmod(j,2)[1])
                a += divmod(j,2)[1]
            s = str(divmod(a,2)[1])
        else:
            # int(divmod(16/16 ,2)[1])
            s = str(divmod((2**i-divmod(A,2**i)[1]) * int(divmod(A/2**i ,2)[1])+(divmod(B,2**i)[1]+1) * int(divmod(B/2**i ,2)[1]),2)[1]) + s
    print(int(s,2))

Buggy python submission (verdict: Runtime Error):
import math
A,B = list(map(int,input().split()))
s =""
for i in range(int(math.log2(B))+1):
    if i == 0:
        a =0
        for j in range(A,4*(divmod(A,4)[0]+1)):
            #print(divmod(j,2)[1])
            a += divmod(j,2)[1]
        for j in range(4*(divmod(B,4)[0]),B+1):
            #print(divmod(j,2)[1])
            a += divmod(j,2)[1]
        s = str(divmod(a,2)[1])
    else:
        # int(divmod(16/16 ,2)[1])
        s = str(divmod((2**i-divmod(A,2**i)[1]) * int(divmod(A/2**i ,2)[1])+(divmod(B,2**i)[1]+1) * int(divmod(B/2**i ,2)[1]),2)[1]) + s
print(int(s,2))

Fixed submission:
import math
A,B = list(map(int,input().split()))
s =""
if B == 0:
    print(0)
else:
    for i in range(int(math.log2(B))+1):
        if i == 0:
            a =0
            for j in range(A,4*(divmod(A,4)[0]+1)):
                #print(divmod(j,2)[1])
                a += divmod(j,2)[1]
            for j in range(4*(divmod(B,4)[0]),B+1):
                #print(divmod(j,2)[1])
                a += divmod(j,2)[1]
            s = str(divmod(a,2)[1])
        else:
            # int(divmod(16/16 ,2)[1])
            s = str(divmod((2**i-divmod(A,2**i)[1]) * int(divmod(A/2**i ,2)[1])+(divmod(B,2**i)[1]+1) * int(divmod(B/2**i ,2)[1]),2)[1]) + s
    print(int(s,2))

Buggy python submission (verdict: Runtime Error):
A,B = list(map(int,input().split()))
s =""
for i in range(int(math.log2(B))+1):
    if i == 0:
        a =0
        for j in range(A,4*(divmod(A,4)[0]+1)):
            #print(divmod(j,2)[1])
            a += divmod(j,2)[1]
        for j in range(4*(divmod(B,4)[0]),B+1):
            #print(divmod(j,2)[1])
            a += divmod(j,2)[1]
        s = str(divmod(a,2)[1])
    else:
        # int(divmod(16/16 ,2)[1])
        s = str(divmod((2**i-divmod(A,2**i)[1]) * int(divmod(A/2**i ,2)[1])+(divmod(B,2**i)[1]+1) * int(divmod(B/2**i ,2)[1]),2)[1]) + s
print(int(s,2))

Fixed submission:
import math
A,B = list(map(int,input().split()))
s =""
if B == 0:
    print(0)
else:
    for i in range(int(math.log2(B))+1):
        if i == 0:
            a =0
            for j in range(A,4*(divmod(A,4)[0]+1)):
                #print(divmod(j,2)[1])
                a += divmod(j,2)[1]
            for j in range(4*(divmod(B,4)[0]),B+1):
                #print(divmod(j,2)[1])
                a += divmod(j,2)[1]
            s = str(divmod(a,2)[1])
        else:
            # int(divmod(16/16 ,2)[1])
            s = str(divmod((2**i-divmod(A,2**i)[1]) * int(divmod(A/2**i ,2)[1])+(divmod(B,2**i)[1]+1) * int(divmod(B/2**i ,2)[1]),2)[1]) + s
    print(int(s,2))