Buggy python submission (verdict: Runtime Error):
import sys
sys.setrecursionlimit(10 ** 9)
input = sys.stdin.readline
from itertools import permutations,  combinations, accumulate
from functools import *
from collections import deque, defaultdict, Counter
from heapq import heapify, heappop, heappush, heappushpop

INF = float('inf')
NIL = - 1

import numpy as np

L, R = map(int, input().split())
if (L - R) > 2020:
    print(0)
    exit()
else:
    k = np.arange(L, R + 1, dtype=np.int64)
    k = k % 2019
    k = sorted(k)
    print(k[0] * k[1])


Fixed submission:
import sys
sys.setrecursionlimit(10 ** 9)
input = sys.stdin.readline
from itertools import permutations,  combinations, accumulate
from functools import *
from collections import deque, defaultdict, Counter
from heapq import heapify, heappop, heappush, heappushpop

INF = float('inf')
NIL = - 1

L, R = map(int, input().split())
if (R - L) > 3000:
    print(0)
    exit()
else:
    ans = 2019
    for i in range(L, R):
        for j in range(i + 1, R + 1):
            ans = min(ans, (i * j) % 2019)
    print(ans)

Buggy python submission (verdict: Runtime Error):
import sys
sys.setrecursionlimit(10 ** 9)
input = sys.stdin.readline
from itertools import permutations,  combinations, accumulate
from functools import *
from collections import deque, defaultdict, Counter
from heapq import heapify, heappop, heappush, heappushpop

INF = float('inf')
NIL = - 1

import numpy as np

L, R = map(int, input().split())
if (L - R) > 2019:
    k = np.arange(L, L + 2019, dtype=np.int64)
else:
    k = np.arange(L, R + 1, dtype=np.int64)

k = k % 2019
print(k[0] * k[1])


Fixed submission:
import sys
sys.setrecursionlimit(10 ** 9)
input = sys.stdin.readline
from itertools import permutations,  combinations, accumulate
from functools import *
from collections import deque, defaultdict, Counter
from heapq import heapify, heappop, heappush, heappushpop

INF = float('inf')
NIL = - 1

L, R = map(int, input().split())
if (R - L) > 3000:
    print(0)
    exit()
else:
    ans = 2019
    for i in range(L, R):
        for j in range(i + 1, R + 1):
            ans = min(ans, (i * j) % 2019)
    print(ans)

Buggy python submission (verdict: Runtime Error):
import sys
sys.setrecursionlimit(10 ** 9)
input = sys.stdin.readline
from itertools import permutations,  combinations, accumulate
from functools import *
from collections import deque, defaultdict, Counter
from heapq import heapify, heappop, heappush, heappushpop

import numpy as np

INF = float('inf')
NIL = - 1

L, R = map(int, input().split())
k = np.arange(L, R + 1, dtype=np.int64)
k = k % 2019
print(k[0] * k[1])

Fixed submission:
import sys
sys.setrecursionlimit(10 ** 9)
input = sys.stdin.readline
from itertools import permutations,  combinations, accumulate
from functools import *
from collections import deque, defaultdict, Counter
from heapq import heapify, heappop, heappush, heappushpop

INF = float('inf')
NIL = - 1

L, R = map(int, input().split())
if (R - L) > 3000:
    print(0)
    exit()
else:
    ans = 2019
    for i in range(L, R):
        for j in range(i + 1, R + 1):
            ans = min(ans, (i * j) % 2019)
    print(ans)

Buggy python submission (verdict: Runtime Error):
import sys
sys.setrecursionlimit(10 ** 9)
input = sys.stdin.readline
from itertools import permutations,  combinations, accumulate
from functools import *
from collections import deque, defaultdict, Counter
from heapq import heapify, heappop, heappush, heappushpop

INF = float('inf')
NIL = - 1

import numpy as np

L, R = map(int, input().split())
k = np.arange(L, R + 1, dtype=np.int64)
k = k % 2019
# print(k)
# print(sorted(k))
print(k[0] * k[1])









# def main():

# if __name__ == '__main__':
#     main()


Fixed submission:
import sys
sys.setrecursionlimit(10 ** 9)
input = sys.stdin.readline
from itertools import permutations,  combinations, accumulate
from functools import *
from collections import deque, defaultdict, Counter
from heapq import heapify, heappop, heappush, heappushpop

INF = float('inf')
NIL = - 1

L, R = map(int, input().split())
if (R - L) > 3000:
    print(0)
    exit()
else:
    ans = 2019
    for i in range(L, R):
        for j in range(i + 1, R + 1):
            ans = min(ans, (i * j) % 2019)
    print(ans)