Buggy python submission (verdict: Runtime Error):
import sys
input = sys.stdin.readline
s=input()
b=0
m=len(s)
c=[0 for i in range(2019)]
c[0]=c[0]+1
a=""
e=0
for i in range(m-1,-1,-1):
    a=str(a)
    a=int(s[i]+a)
    d=a%2019
    c[d]=c[d]+1
e = sum(i * (i - 1) // 2 for i in c)
print(e)


Fixed submission:
s=input()
b=0
m=len(s)
c=[0 for i in range(2019)]
c[0]=c[0]+1
a=""
e=0
f=1
s= ''.join(list(reversed(s)))
for i in s:
    e+=int(i)*f
    g=e%2019
    c[g]+=1
    f*=10
    f%=2019
e = sum(i * (i - 1) // 2 for i in c)
print(e)

Buggy python submission (verdict: Time Limit Exceeded):
s=input()
b=0
m=len(s)
c=[0 for i in range(2019)]
c[0]=c[0]+1
a=""
e=0
for i in range(m-1,-1,-1):
    a=str(a)
    a=int(s[i]+a)
    d=a%2019
    c[d]=c[d]+1
for i in c:
    if i<=1:
        continue
    e+=i*(i-1)//2
print(e)


Fixed submission:
s=input()
b=0
m=len(s)
c=[0 for i in range(2019)]
c[0]=c[0]+1
a=""
e=0
f=1
s= ''.join(list(reversed(s)))
for i in s:
    e+=int(i)*f
    g=e%2019
    c[g]+=1
    f*=10
    f%=2019
e = sum(i * (i - 1) // 2 for i in c)
print(e)

Buggy python submission (verdict: Time Limit Exceeded):
s=input()
b=0
m=len(s)
c=[0 for i in range(2019)]
c[0]=c[0]+1
a=""
e=0
for i in range(m-1,-1,-1):
    a=str(a)
    a=int(s[i]+a)
    d=a%2019
    c[d]=c[d]+1
for i in c:
    if i<=1:
        continue
    e+=i*(i-1)//2
print(e)


Fixed submission:
s=input()
b=0
m=len(s)
c=[0 for i in range(2019)]
c[0]=c[0]+1
a=""
e=0
f=1
s= ''.join(list(reversed(s)))
for i in s:
    e+=int(i)*f
    g=e%2019
    c[g]+=1
    f*=10
    f%=2019
e = sum(i * (i - 1) // 2 for i in c)
print(e)

Buggy python submission (verdict: Time Limit Exceeded):
s=input()
b=0
m=len(s)
c=[0 for i in range(2019)]
c[0]=c[0]+1
a=""
e=0
for i in range(m-1,-1,-1):
    a=str(a)
    a=s[i]+a
    a=int(a)
    d=a%2019
    c[d]=c[d]+1
for i in c:
    e+=i*(i-1)//2
print(e)


Fixed submission:
s=input()
b=0
m=len(s)
c=[0 for i in range(2019)]
c[0]=c[0]+1
a=""
e=0
f=1
s= ''.join(list(reversed(s)))
for i in s:
    e+=int(i)*f
    g=e%2019
    c[g]+=1
    f*=10
    f%=2019
e = sum(i * (i - 1) // 2 for i in c)
print(e)

Buggy python submission (verdict: Time Limit Exceeded):
s=input()
b=0
m=len(s)
c=0
for i in range(m-1,2,-1):
    a=s[i-2]+s[i-1]+s[i]
    for j in range(i-3,-1,-1):
        # if c==1 and int(s[j])%3!=0:
        #     c=0
        #     continue
        a=str(a)
        a=int(s[j]+a)
        # print(a)
        # c=0
        # if a%3!=0:
        #     continue
        # c=1
        if a%2019==0:
            # print(b)
            b+=1

            if i>=3:
                c=int(s[i-3]+s[i-2]+s[i-1]+s[i])
                if c%2019==0:

                    b+=1
            break
        # print(a)

print(b)


Fixed submission:
s=input()
b=0
m=len(s)
c=[0 for i in range(2019)]
c[0]=c[0]+1
a=""
e=0
f=1
s= ''.join(list(reversed(s)))
for i in s:
    e+=int(i)*f
    g=e%2019
    c[g]+=1
    f*=10
    f%=2019
e = sum(i * (i - 1) // 2 for i in c)
print(e)

Buggy python submission (verdict: Time Limit Exceeded):
s=input()
b=0
m=len(s)
c=0
for i in range(m-1,2,-1):
    a=s[i-2]+s[i-1]+s[i]
    for j in range(i-3,-1,-1):
        # if c==1 and int(s[j])%3!=0:
        #     c=0
        #     continue
        a=str(a)
        a=int(s[j]+a)
        # print(a)
        # c=0
        # if a%3!=0:
        #     continue
        # c=1
        if a%2019==0:
            # print(b)
            b+=1

            if i>=3:
                c=int(s[i-3]+s[i-2]+s[i-1]+s[i])
                if c%2019==0:

                    b+=1
                    break

print(b)


Fixed submission:
s=input()
b=0
m=len(s)
c=[0 for i in range(2019)]
c[0]=c[0]+1
a=""
e=0
f=1
s= ''.join(list(reversed(s)))
for i in s:
    e+=int(i)*f
    g=e%2019
    c[g]+=1
    f*=10
    f%=2019
e = sum(i * (i - 1) // 2 for i in c)
print(e)

Buggy python submission (verdict: Time Limit Exceeded):
s=input()
b=0
m=len(s)
c=0
for i in range(m-1,2,-1):
    a=s[i-2]+s[i-1]+s[i]
    for j in range(i-3,-1,-1):
        # if c==1 and int(s[j])%3!=0:
        #     c=0
        #     continue
        a=str(a)
        a=int(s[j]+a)
        # print(a)
        # c=0
        # if a%3!=0:
        #     continue
        # c=1
        if a%2019==0:
            # print(b)
            b+=1
            break

print(b)


Fixed submission:
s=input()
b=0
m=len(s)
c=[0 for i in range(2019)]
c[0]=c[0]+1
a=""
e=0
f=1
s= ''.join(list(reversed(s)))
for i in s:
    e+=int(i)*f
    g=e%2019
    c[g]+=1
    f*=10
    f%=2019
e = sum(i * (i - 1) // 2 for i in c)
print(e)

Buggy python submission (verdict: Time Limit Exceeded):
s=input()
b=0
m=len(s)
for i in range(m-3):
    a=s[i]+s[i+1]+s[i+2]
    
    for j in range(i+3,m):

        a=a+s[j]
        a=int(a)

        if a%2019==0:
            b+=1
        a=str(a)
print(b)


Fixed submission:
s=input()
b=0
m=len(s)
c=[0 for i in range(2019)]
c[0]=c[0]+1
a=""
e=0
f=1
s= ''.join(list(reversed(s)))
for i in s:
    e+=int(i)*f
    g=e%2019
    c[g]+=1
    f*=10
    f%=2019
e = sum(i * (i - 1) // 2 for i in c)
print(e)

Buggy python submission (verdict: Time Limit Exceeded):
s=input()
b=0
m=len(s)
for i in range(m-3):
    a=s[i]+s[i+1]+s[i+2]
    
    for j in range(i+3,m):

        a=a+s[j]
        a=int(a)

        if a%2019==0:
            b+=1
        a=str(a)
print(b)


Fixed submission:
s=input()
b=0
m=len(s)
c=[0 for i in range(2019)]
c[0]=c[0]+1
a=""
e=0
f=1
s= ''.join(list(reversed(s)))
for i in s:
    e+=int(i)*f
    g=e%2019
    c[g]+=1
    f*=10
    f%=2019
e = sum(i * (i - 1) // 2 for i in c)
print(e)