Buggy python submission (verdict: Time Limit Exceeded):
from sys import stdin
s = stdin.readline().rstrip()
n = len(s)
dic = {}
dic[0] = 1
now = 0
mul = 0
for i in range(n-1,-1,-1):
    now = (now+(10**mul)*int(s[i]))%2019
    if now in dic:
        dic[now] += 1
    else:
        dic[now] = 1
    mul += 1
print(sum(dic[i]*(dic[i]-1)//2 for i in dic))

Fixed submission:
from sys import stdin
s = stdin.readline().rstrip()
n = len(s)
dic = {}
dic[0] = 1
now = 0
mul = 1
for i in range(n-1,-1,-1):
    now = (now+(10*mul)*int(s[i]))%2019
    if now in dic:
        dic[now] += 1
    else:
        dic[now] = 1
    mul *= 10
    mul %= 2019
print(sum(dic[i]*(dic[i]-1)//2 for i in dic))

Buggy python submission (verdict: Time Limit Exceeded):
from numba import jit
s = input()
n = len(s)
dic = {}
@jit
def main():
    global dic
    dic[0] = 1
    for i in range(n-1,-1,-1):
        p = int(s[i:])%2019
        if p in dic:
            dic[p] += 1
        else:
            dic[p] = 1
    return dic

main()
print(sum(dic[i]*(dic[i]-1)//2 for i in dic))

Fixed submission:
from sys import stdin
s = stdin.readline().rstrip()
n = len(s)
dic = {}
dic[0] = 1
now = 0
mul = 1
for i in range(n-1,-1,-1):
    now = (now+(10*mul)*int(s[i]))%2019
    if now in dic:
        dic[now] += 1
    else:
        dic[now] = 1
    mul *= 10
    mul %= 2019
print(sum(dic[i]*(dic[i]-1)//2 for i in dic))

Buggy python submission (verdict: Time Limit Exceeded):
def main():
    s = input()
    n = len(s)
    dic = {}
    dic[0] = 1
    for i in range(n-1,-1,-1):
        p = int(s[i:])%2019
        if p in dic:
            dic[p] += 1
        else:
            dic[p] = 1
    print(sum(dic[i]*(dic[i]-1)//2 for i in dic))

if __name__ == "__main__":
    main()

Fixed submission:
from sys import stdin
s = stdin.readline().rstrip()
n = len(s)
dic = {}
dic[0] = 1
now = 0
mul = 1
for i in range(n-1,-1,-1):
    now = (now+(10*mul)*int(s[i]))%2019
    if now in dic:
        dic[now] += 1
    else:
        dic[now] = 1
    mul *= 10
    mul %= 2019
print(sum(dic[i]*(dic[i]-1)//2 for i in dic))

Buggy python submission (verdict: Time Limit Exceeded):
from itertools import groupby
s = input()
n = len(s)
li = [0]
for i in range(n-1,-1,-1):
    p = s[i:]
    li.append(int(p)%2019)
li.sort()
lin = []
for key, value in groupby(li):
    lin.append(len(list(value)))
point = 0
for i in lin:
    point += i*(i-1)//2
print(point)

Fixed submission:
from sys import stdin
s = stdin.readline().rstrip()
n = len(s)
dic = {}
dic[0] = 1
now = 0
mul = 1
for i in range(n-1,-1,-1):
    now = (now+(10*mul)*int(s[i]))%2019
    if now in dic:
        dic[now] += 1
    else:
        dic[now] = 1
    mul *= 10
    mul %= 2019
print(sum(dic[i]*(dic[i]-1)//2 for i in dic))

Buggy python submission (verdict: Time Limit Exceeded):
from itertools import groupby
s = input()
n = len(s)
li = [0]
for i in range(n-1,-1,-1):
    p = s[i:]
    li.append(int(p)%2019)
li.sort()
lin = []
for key, value in groupby(li):
    lin.append(len(list(value)))
point = 0
for i in lin:
    point += i*(i-1)//2
print(point)

Fixed submission:
from sys import stdin
s = stdin.readline().rstrip()
n = len(s)
dic = {}
dic[0] = 1
now = 0
mul = 1
for i in range(n-1,-1,-1):
    now = (now+(10*mul)*int(s[i]))%2019
    if now in dic:
        dic[now] += 1
    else:
        dic[now] = 1
    mul *= 10
    mul %= 2019
print(sum(dic[i]*(dic[i]-1)//2 for i in dic))

Buggy python submission (verdict: Time Limit Exceeded):
s = input()
n = len(s)
point = 0
for i in range(n-1):
    for j in range(i+1,n):
        if int(s[i:j+1])%2019 == 0:
            point += 1
print(point)

Fixed submission:
from sys import stdin
s = stdin.readline().rstrip()
n = len(s)
dic = {}
dic[0] = 1
now = 0
mul = 1
for i in range(n-1,-1,-1):
    now = (now+(10*mul)*int(s[i]))%2019
    if now in dic:
        dic[now] += 1
    else:
        dic[now] = 1
    mul *= 10
    mul %= 2019
print(sum(dic[i]*(dic[i]-1)//2 for i in dic))