qyliang/CodeNanoFix huggingface dataset:
Buggy code:
import numpy as np
import sys

S = input()
T = input()

counter = 0
max_counter = 0

for i in range(len(S) - len(T) + 1):
    for j in range(len(T)):
        if S[j+i] == T[j]:
            counter = counter + 1
    if counter > max_counter:
        max_counter = counter
    print(counter)
    print('max = ' + str(max_counter))
    counter = 0

print(int(len(T)) - int(max_counter))

Fixed code:
import numpy as np
import sys

S = input()
T = input()

counter = 0
max_counter = 0

for i in range(len(S) - len(T) + 1):
    for j in range(len(T)):
        if S[j+i] == T[j]:
            counter = counter + 1
    if counter > max_counter:
        max_counter = counter
    # print(counter)
    # print('max = ' + str(max_counter))
    counter = 0

print(int(len(T)) - int(max_counter))
Buggy code:
# coding: utf-8

def main():
    s = input()
    t = input()

    ans = len(t)
    
    for i in range(len(s) - len(t)):
        a = s[i:i+len(t)]
        print(a, t)
        ans_list = [1 for x, y in zip(a, t) if x!=y]
        tmp_ans = sum(ans_list)
        ans = min(ans, tmp_ans)
        
        if ans == 0:
            break
        
    print(ans)
    
        

main()

Fixed code:
# coding: utf-8

def main():
    s = input()
    t = input()

    ans = len(t)
    
    for i in range(len(s) - len(t) + 1):
        a = s[i:i+len(t)]
        # print(a, t)
        ans_list = [1 for x, y in zip(a, t) if x!=y]
        tmp_ans = sum(ans_list)
        ans = min(ans, tmp_ans)
        
        if ans == 0:
            break
        
    print(ans)
    
        

main()
Buggy code:
import sys

s = input()
t = input()

finalans = 0
for i in range(len(s) - len(t) + 1):
    ans = 0
    for j in range(len(t)):
        if (s[i+j] == t[j]):
            pass
        else:
            ans += 1
    finalans = min(finalans, ans)

print(finalans)


Fixed code:
import sys

s = input()
t = input()

finalans = 1000000
for i in range(len(s) - len(t) + 1):
    ans = 0
    for j in range(len(t)):
        if (s[i+j] == t[j]):
            pass
        else:
            ans += 1
    finalans = min(finalans, ans)

print(finalans)
Buggy code:
#!/usr/bin/python3
# -*- coding: utf-8 -*-
s = input()
t = input()
min_count = 1000
for i in range(len(s) - len(t) + ):
    count = 0
    for j in range(len(t)):
        if s[i+j] != t[j]:
            count += 1
    min_count = min(count, min_count)
    if min_count == 0:
        break
print(min_count)

Fixed code:
#!/usr/bin/python3
# -*- coding: utf-8 -*-
s = input()
t = input()
min_count = 1000
for i in range(len(s) - len(t) + 1):
    count = 0
    for j in range(len(t)):
        if s[i+j] != t[j]:
            count += 1
    min_count = min(count, min_count)
    if min_count == 0:
        break
print(min_count)
Buggy code:
s = input()
t = input()

sl = len(s)
tl = len(t)
count = 0
for i in range(0,sl-tl+1):
    sb = s[i:i+tl]
    for j in range(tl):
        co = 0
        if sb[j] == t[j]:
            co += 1
    if co > count:
        count = co

print(tl - count)


Fixed code:
s = input()
t = input()

sl = len(s)
tl = len(t)
count = 0
for i in range(0,sl-tl+1):
    sb = s[i:i+tl]

    co = 0
    for j in range(tl):

        
        if sb[j] == t[j]:
            co += 1
    if co > count:
        count = co


print(tl - count)
Buggy code:
s=input()
t=input()
ans=len(t)
for i in range(len(s)-len(t)+1):
	p=s[i:i+len(t)]
	cur = 0
	for j in range(len(t)):
		if t[j] != t[i + j]:
			cur += 1	
	ans=max(ans,cur)
print(ans)


Fixed code:
s=input()
t=input()
ans=len(t)
for i in range(len(s)-len(t)+1):
	p=s[i:i+len(t)]
	cur = 0
	for j in range(len(t)):
		if t[j] != p[j]:
			cur += 1
	ans=min(ans,cur)
print(ans)
Buggy code:
S=input()
T=input()
lenS=len(S)
lenT=len(T)
count=[]

for i in range(lenS-lenT+1):
    c=0
    for j in range(lenT):
        if T[j]!=S[i+j]:
            c=c+1
        j=j+1
        print(c)
    count.append(c)
    i=i+1
print(min(count))

Fixed code:
S=input()
T=input()
lenS=len(S)
lenT=len(T)
count=[]

for i in range(lenS-lenT+1):
    c=0
    for j in range(lenT):
        if T[j]!=S[i+j]:
            c=c+1
        j=j+1
    count.append(c)
    i=i+1
print(min(count))
Buggy code:
s = input()
t = input()


ans = len(t)
flag = False


for i in range(len(s)-len(t)):
    dif = 0
    for j in range(len(t)):
        if t[j] != s[j]:
            dif += 1

    ans = min(ans, dif)

print(ans)

# for i in range(len(t)+1, 0, -1):
#    for j in range(0, len(t)-i+1):
#        sb = t[j:j+i]
#        if sb in s[j:]:
#            print(sb, s[j:])
#            ans = len(t)-len(sb)
#            flag = True
#            break
#
#    if flag:
#        break


print(ans)


Fixed code:
s = input()
t = input()


ans = len(t)


for i in range(len(s)-len(t)+1):
    dif = 0
    for j in range(len(t)):
        if t[j] != s[i+j]:
            dif += 1

    ans = min(ans, dif)

print(ans)

# for i in range(len(t)+1, 0, -1):
#    for j in range(0, len(t)-i+1):
#        sb = t[j:j+i]
#        if sb in s[j:]:
#            print(sb, s[j:])
#            ans = len(t)-len(sb)
#            flag = True
#            break
#
#    if flag:
#        break
Buggy code:
from collections import deque
import sys, copy, itertools,heapq
input = sys.stdin.readline
 
S = input()
T = input()
s = len(S)
t = len(T)
ANS=[0]*(len(S))
 
for i in range(len(S)-len(T)):
  for j in range(len(T)):
    if S[i+j] == T[j]:
      ANS[i] += 1

ans = t- max(ANS)

#print(s)
#print(t)
#print(ANS)
print(ans)

Fixed code:
from collections import deque
import sys, copy, itertools,heapq
#input = sys.stdin.readline
 
S = input()
T = input()
s = len(S)
t = len(T)
A=[0]*(len(S))
 
ans = t
for i in range(len(S)-len(T)+1):
  for j in range(len(T)):
    if S[i+j] != T[j]:
      A[i] += 1
  ans = min(ans, A[i])
 
#print(s)
#print(t)
#print(ANS)
print(ans)
Buggy code:

input = sys.stdin.readline

S = input()
T = input()

result = float('inf')
for i in range(len(S) - len(T) + 1):
    t = 0
    for j in range(len(T)):
        if S[i + j] != T[j]:
            t += 1
    result = min(result, t)
print(result)


Fixed code:
#input = sys.stdin.readline
 
S = input()
T = input()
 
result = float('inf')
for i in range(len(S) - len(T) + 1):
    t = 0
    for j in range(len(T)):
        if S[i + j] != T[j]:
            t += 1
    result = min(result, t)
print(result)
Buggy code:
list_data = [input() for _ in range(2)]
print(list_data)

s = list_data[0]
t = list_data[1]

len_t = len(t)

max_correct = 0
for i in range(len(s)-len(t)):
  correct = 0
  for j in range(len(t)):
    if s[i+j] == t[j]:
      correct += 1
  
  if max_correct < correct:
    max_correct = correct

print(len_t - max_correct)

Fixed code:
list_data = [input() for _ in range(2)]

s = list_data[0]
t = list_data[1]

len_t = len(t)

max_correct = 0
for i in range(len(s)-len(t)+1):
  correct = 0
  for j in range(len(t)):
    if s[i+j] == t[j]:
      correct += 1
  
  if max_correct < correct:
    max_correct = correct

print(len_t - max_correct)
Buggy code:
S = input()
T = input()

s = len(S)
t = len(T)
ans1 = 10000000

for i in range(s - t + 1):
  ans = 0
  for j in range(t):
    if t[j] != s[i + j]:
      ans += 1
      
  ans1 = ans
      
print(ans1)

Fixed code:
S = input()
T = input()

s = len(S)
t = len(T)
ans1 = 10000000

for i in range(s - t + 1):
  ans = 0
  for j in range(t):
    if T[j] != S[i + j]:
      ans += 1
      
  ans1 = min(ans, ans1)
      
print(ans1)
Buggy code:
s = input()
t = input()
s_len = len(s)
t_len = len(t)
ans = 1000
for i in range(s_len-t_len+1):
    cnt = 0
    for j in range(t_len):
        print(s[i+j])
        if s[i+j] != t[j]:
            cnt += 1
    ans = min(ans,cnt)
print(ans)

Fixed code:
s = input()
t = input()
s_len = len(s)
t_len = len(t)
ans = 1000
for i in range(s_len-t_len+1):
    cnt = 0
    for j in range(t_len):
        if s[i+j] != t[j]:
            cnt += 1
    ans = min(ans,cnt)
print(ans)
Buggy code:
s=input()
t=input()
q=10**18
ans=0
for i in range(len(s)-len(t)+1):
    for j in range(len(t)):
        if t[j]!=s[i+j]:
            ans+=1
            ans=min(ans,q)
print(ans)

Fixed code:
s=input()
t=input()
q=10**18
for i in range(len(s)-len(t)+1):
    ans=0
    for j in range(len(t)):
        if t[j]!=s[i+j]:
            ans+=1
    q=min(ans,q)
print(q)
Buggy code:
s=input()
t=input()
print(len(t)-min(sum(x!=y for x,y in zip(s[i:],t))for i in range(-~len(s)-len(t))))

Fixed code:
s=input()
t=input()
print(min(sum(x!=y for x,y in zip(s[i:],t))for i in range(-~len(s)-len(t))))
Buggy code:
S, T = [input() for _ in range(2)]
answer = 1001

for i in range(len(S) - len(T) + 1):
	k = 0
	U = S[i:i + len(T)]
	for j in range(len(T)):
		if T(j) != U(j):
			k += 1
	answer = min(answer, k)
print(answer)

Fixed code:
S, T = [input() for _ in range(2)]
answer = 1001

for i in range(len(S) - len(T) + 1):
	k = 0
	U = S[i:i + len(T)]
	for j in range(len(T)):
		if T[j] != U[j]:
			k += 1
	answer = min(answer, k)
print(answer)
Buggy code:
s = input().split()
S = s[0]
T = s[1]

score = []
for i in range(len(S)-len(T)):
    U = s[i: i+len(T)]
    cnt = 0
    for j in range(T):
        if U[j] != T[j]:
            cnt = cnt + 1
        score.append(cnt)
print(min(score))



Fixed code:
S = input()
T = input()

score = []
for i in range(len(S)-len(T)+1):
    U = S[i: i+len(T)]
    cnt = 0
    for j in range(len(T)):
        if U[j] != T[j]:
            cnt = cnt + 1
    score.append(cnt)
print(min(score))
Buggy code:
S = input()
T = input()

s = len(S)
t = len(T)

ans = 10**9

for i in range(s - t + 1):
    tmp = 0
    for j in range(t):
        if S[i + j] != T[j]:
            tmp += 1

        print(S[i + j], T[j])

    ans = min(ans, tmp)

print(ans)

Fixed code:
S = input()
T = input()

s = len(S)
t = len(T)

ans = 10**9

for i in range(s - t + 1):
    tmp = 0
    for j in range(t):
        if S[i + j] != T[j]:
            tmp += 1

    ans = min(ans, tmp)

print(ans)
Buggy code:
s=input()
t=input()
i,m=0,1e9
while(i<len(s)):
    c=0
    if(i+len(t)<len(s)):
        for j in range(len(t)):
            if(s[i]!=t[j]):
                c+=1
            i+=1 
    else:
        break
    m=min(m,c)
print(m)       
    

Fixed code:
s=input()
t=input()
i,m=0,1e9
while(i+len(t)<=len(s)):
    c=0
    for j in range(len(t)):
        if(s[i+j]!=t[j]):
            c+=1
    m=min(m,c)
    i+=1
print(m)
Buggy code:
S = input()
T = input()
n = len(T)

def c(s, t):
  print(s)
  r = 0
  for i in range(n):
    if s[i] == t[i]:
      r += 1
  return n - r

ans = n
for i in range( len(S) - n + 1):
  temp = c(S[i:i+n],T)
  ans = min( ans, temp)

print(ans)

Fixed code:
S = input()
T = input()
n = len(T)

def c(s, t):
  #print(s)
  r = 0
  for i in range(n):
    if s[i] == t[i]:
      r += 1
  return n - r

ans = n
for i in range( len(S) - n + 1):
  temp = c(S[i:i+n],T)
  ans = min( ans, temp)

print(ans)
Buggy code:
long_str = input()
short_str = input()
short_list = list(short_str)

long_len = len(long_str)
short_len = len(short_str)
iter_num = long_len - short_len + 1

print(short_str)

max_count = 0
for i in range(iter_num):
  tmp = 0
  obj_list = list(long_str[i:(short_len+i)])
  for s, o in zip(short_list, obj_list):
    tmp += int(s == o)
  max_count = max(max_count, tmp)

print(short_len - max_count)


Fixed code:
long_str = input()
short_str = input()
short_list = list(short_str)

long_len = len(long_str)
short_len = len(short_str)
iter_num = long_len - short_len + 1

max_count = 0
for i in range(iter_num):
  tmp = 0
  obj_list = list(long_str[i:(short_len+i)])
  for s, o in zip(short_list, obj_list):
    tmp += int(s == o)
  max_count = max(max_count, tmp)

print(short_len - max_count)
Buggy code:
S=list(input())
T=list(input())

num=1000
for i in range(len(S)-len(T)+1):
    s = S[i:i+len(T)]
    print(s)
    cnt = 0
    for j in range(len(T)):
        if s[j]!=T[j]:
            cnt+=1
    ans=min(num, cnt)
print(ans)


Fixed code:
S=list(input())
T=list(input())
 
num=1000
for i in range(len(S)-len(T)+1):
    s = S[i:i+len(T)]
    cnt = 0
    for j in range(len(T)):
        if s[j]!=T[j]:
            cnt+=1
    num=min(num, cnt)
print(num)
Buggy code:
S = input()
T = input()
s = len(S)
t = len(T)

count = 0
max = 0

for i in range(s-t):
  for j in range(t):
    if S[j] == T[j]:
      count += 1
    if count > max:
      max = count
      count = 0
    else:
      count = 0

print(t-max)

Fixed code:
S = input()
T = input()
s = len(S)
t = len(T)

count = 0
max = 0

for i in range(s-t+1):
  for j in range(t):
    if S[i+j] == T[j]:
      count += 1
  if count > max:
    max = count
    count = 0
  else:
    count = 0

print(t-max)
Buggy code:
import sys


def resolve(in_):
    S = next(in_).strip()
    T = next(in_).strip()

    x = 0
    for i in range(len(S)):
        if len(S) - i < len(T):
            break
        v = 0
        for x, y in zip(S[i:], T)
            if x == y:
                v += 1
            x = max(x, len(T) - v)
    
    return x
    

def main():
    answer = resolve(sys.stdin)
    print(answer)


if __name__ == '__main__':
    main()


Fixed code:
import sys


def resolve(in_):
    S = next(in_).strip()
    T = next(in_).strip()

    ans = 0
    for i in range(len(S)):
        if len(S) - i < len(T):
            break
        v = 0
        for x, y in zip(S[i:], T):
            if x == y:
                v += 1
            ans = max(ans, v)
    
    return len(T) - ans
    

def main():
    answer = resolve(sys.stdin)
    print(answer)


if __name__ == '__main__':
    main()
Buggy code:
s=input()
t=input()
ls=len(s)
lt=len(t)
ans=0
for i in range(ls-lt+1):
  k=0
  for j in range(lt):
    if s[i+j]==t[j]:k+=1
    else:break
  ans=max(ans,k)
print(lt-ans)

Fixed code:
s=input()
t=input()
ls=len(s)
lt=len(t)
ans=0
for i in range(ls-lt+1):
  k=0
  for j in range(lt):
    if s[i+j]==t[j]:k+=1
  ans=max(ans,k)
print(lt-ans)
Buggy code:
s=input()
t=input()
count=0
if len(s)==len(t):
    for i in range(len(t)):
        if t[i]!=s[i]:
            count+=1
    print(count)
    exit()
ans=10000
for i in range(len(s)-len(t)+1):
    for j in range(len(t)):
        print(t[j],s[i+j])
        if t[j]!=s[i+j]:
            count+=1
    ans=min(ans,count)
    count=0
print(ans)

Fixed code:
s=input()
t=input()
count=0
if len(s)==len(t):
    for i in range(len(t)):
        if t[i]!=s[i]:
            count+=1
    print(count)
    exit()
ans=10000
for i in range(len(s)-len(t)+1):
    for j in range(len(t)):
        if t[j]!=s[i+j]:
            count+=1
    ans=min(ans,count)
    count=0
print(ans)
Buggy code:
s=input()
t=input()
a = len(s)
b = len(t)
l = []
for i in range(a-b+1):
    cnt = 0
    c = s[i,i+t]
    for x, y in zip(c, t):
        if x != y:
            cnt +=1
    l.append(cnt)
print(min(l))

Fixed code:
s=input()
t=input()
a = len(s)
b = len(t)
l = []
for i in range(a-b+1):
    cnt = 0
    c = s[i:i+b]
    for x, y in zip(c, t):
        if x != y:
            cnt +=1
    l.append(cnt)
print(min(l))
Buggy code:
minCount = 10000
i = 0
while i < len(s):
    countSame = 0
    j = 0
    while j < len(t) and i+j < len(s):
        if t[j] == s[i+j]:
            countSame += 1
        j += 1
        minCount = min(len(t) - countSame, minCount)
    i += 1
print(minCount)

Fixed code:
s = input()
t = input()
minCount = len(t)
i = 0
while i < len(s) and i + len(t) <= len(s):
    countSame = 0
    j = 0
    while j < len(t):
        if t[j] == s[i+j]:
            countSame += 1
        j += 1
        minCount = min(len(t) - countSame, minCount)
    i += 1
print(minCount)
Buggy code:
s = input()
t = input()

cnt = []
for i in range(len(t)):
    for k in range(i + 1, len(t) + 1):
        if t[i:k] in s[i:]:
            cnt.append(k - i)
        else:
            cnt = [0]
            #print(t[i:k], k - i)
#print(cnt)
print(len(t) - max(cnt))


Fixed code:
s = input()
t = input()

cnt = []
for i in range(len(s) - len(t) + 1):
    cnt1 = 0
    for k in range(len(t)):
        if t[k] == s[i: i + len(t)][k]:
            cnt1 += 1
            cnt.append(cnt1)
            #print(t[i:k], s[i:], k-i)
    else:
        cnt.append(0)
            #print(t[i:k], k - i)
#print(cnt)
print(len(t) - max(cnt))
Buggy code:
import sys
input = sys.stdin.readline
S = input()
T = input()
if len(S) - len(T) > 0:
  score_list = []
  for i in range(len(S) - len(T)):
    s = S[i:i+len(T)]
    score = 0
    for i in range(len(s)):
      if s[i] != T[i]:
        score += 1
    score_list.append(score)
  print(min(score_list))


Fixed code:
import sys
input = sys.stdin.readline
S = input().strip()
T = input().strip()
score_list = []
for i in range(len(S) - len(T) + 1):
  s = S[i:i+len(T)]
  score = 0
  for i in range(len(s)):
    if s[i] != T[i]:
      score += 1
  score_list.append(score)
print(min(score_list))
Buggy code:
S = input()
T = input()

lent = len(T)
ans = lent
for i in range(len(S)-lent+1):
    s = S[i:i+lent]
    lev = 0
    lev = sum(map(lambda x: x[0] != x[1], zip(s, T)))
    print(s)
    print(lev)
    if lev == 0:
        ans = 0
      #  break
    elif lev < ans:
        ans = lev
print(ans)


Fixed code:
S = input()
T = input()

lent = len(T)
ans = lent
for i in range(len(S)-lent+1):
    s = S[i:i+lent]
    lev = 0
    lev = sum(map(lambda x: x[0] != x[1], zip(s, T)))
    if lev == 0:
        ans = 0
        break
    elif lev < ans:
        ans = lev
print(ans)
Buggy code:
N = int(input())
As = list(map(int,input().split()))

out = (sum(As)**2 - sum([a**2 for a in As]))/2
print(out % (10**9+7))

Fixed code:
N = int(input())
As = list(map(int,input().split()))

out = (sum(As)**2 - sum([a**2 for a in As]))//2
print(out % (10**9+7))
Buggy code:
N=int(int(input))
A=list(map(int,input().split()))
sum=sum[A]
b=0
c=0
for i in range(N-1):
    b+=A[i]
    c=(c+(A[i]*(sum-b))) %(10**9+7)
print(c)

Fixed code:
N=int(input())
a=list(map(int, input().split()))
sum=sum(a)
b=0
c=0
for i in range(N-1):
    b+=a[i]
    c=(c+(a[i]*(sum-b))) %(10**9+7)
print(c)
Buggy code:
n=int(input())
a=list(input().split(' '))
total=0
S_i=0
for i in range(n-1):
    S_i+=a[n-1-i]
    S_i=S_i%(7+10**9)
    total+=S_i*a[n-2-i]
    total=total%(7+10**9)
print(total)

Fixed code:
n=int(input())
a=list(input().split(' '))
total=0
S_i=0
for i in range(n-1):
    S_i+=int(a[n-1-i])
    S_i=S_i%(7+10**9)
    total+=S_i*int(a[n-2-i])
    total=total%(7+10**9)
print(total)
Buggy code:
import sys

input = sys.stdin.buffer.readline

N = int(input())
A = list(map(int, input().split()))
MOD = 10**9 + 7

cumsum = [0]
for i in range(1, N):
    v = (A[0] * A[i]) % MOD
    cumsum.append((cumsum[-1] + v) % MOD)
print(cumsum)

ans = 0
for i in range(N):
    ans += (A[i] * (cumsum[-1] - cumsum[i])) % MOD
    ans %= MOD
print(ans)


Fixed code:
import sys
input = sys.stdin.buffer.readline
MOD = 10**9 + 7

N = int(input())
A = [0] + list(map(int, input().split()))

C = [0]
for i in range(1, len(A)):
    C.append(C[-1] + A[i])

ans = 0
for i in range(1, N):
    ans += A[i] * (C[-1] - C[i])

ans %= MOD
print(ans)
Buggy code:
n = int(input())
A = map(int, input().split())

S = sum(A)
S2 = sum(map(lambda x:x*x, A))

print(S*S - S2 / 2 % (10**9+7))

Fixed code:
n = int(input())
A = list(map(int, input().split()))

S = sum(A)
S2 = sum(map(lambda x: x * x, A))

print((S * S - S2) // 2 % (10 ** 9 + 7))
Buggy code:
from itertools import accumulate
def main():
    n=int(input())
    a=list(map(int,input().split()))
    aa=list(accumulate(a))
    mod=10**9+7
    ans=0
    print(aa)
    for i in range(n):
        ans += a[i]*(aa[-1]-aa[i])%mod
    print(ans%mod)
    
if __name__ == "__main__":
    main()

Fixed code:
from itertools import accumulate
def main():
    mod=10**9+7
    n=int(input())
    a=list(map(int,input().split()))
    aa=[0]+list(accumulate(a))
    ans=0
    for i in range(n-1):
        ans += a[i]*(aa[-1]-aa[i+1])%mod
    print(ans%mod)

if __name__ == '__main__':
    main()
Buggy code:
from sys import stdin,stdout
def INPUT():return list(int(i) for i in stdin.readline().split())
def inp():return stdin.readline()
def out(x):return stdout.write(x)
import math
import random
J=int(1e9)+7

###############################################################################\n=17
n=int(input())
A=INPUT()
sum=0
for i in range(n):
    sum+=A[i]
    sum%=J 
sum=sum*sum  
sum%=J  
s=0
for i in range(n):
    s+=A[i]**2
    s%=j  
ans=sum-j  
ans%=J  
print(ans)

Fixed code:
from sys import stdin,stdout
def INPUT():return list(int(i) for i in stdin.readline().split())
def inp():return stdin.readline()
def out(x):return stdout.write(x)
import math
import random
J=int(1e9)+7

###############################################################################\n=17
n=int(input())
A=INPUT()
sum=0
for i in range(n):
    sum+=A[i]
sum=sum*sum

s=0
for i in range(n):
    s+=A[i]**2

ans=(sum-s)//2
ans%=J
print(ans)
Buggy code:
num = int(input())
input_line = input().split()

num_list = [int(input_line[i]) for i in range(num)]
law = 10 ** 9 + 7
sigma = 0
for i in range(num):
	num_a = num_list[i]
    temp_sum = 0
	for j in range(i+1,num):
		temp_sum += num_list[j]
    	
    
    sigma += num_a * temp_sum

sigma %= law
print(sigma)


Fixed code:
num = int(input())
input_line = input().split()

law = 10 ** 9 + 7
num_list = [int(input_line[i])%law for i in range(num)]

sigma = 0
temp_sum = 0
for j in range(num):
	temp_sum += num_list[j]

for i in range(num):
	num_a = num_list[i]
	temp_sum -= num_a
	sigma += num_a * temp_sum


sigma %= law
print(sigma)
Buggy code:
def findProductSum(A, n): 
      
    # calculating array sum (a1 + a2 ... + an) 
    array_sum = 0
    for i in range(0, n, 1): 
        array_sum = array_sum + A[i] 
  
    # calcualting square of array sum 
    # (a1 + a2 + ... + an)^2 
    array_sum_square = array_sum * array_sum 
  
    # calcualting a1^2 + a2^2 + ... + an^2 
    individual_square_sum = 0
    for i in range(0, n, 1): 
        individual_square_sum += A[i] * A[i] 
  
    # required sum is (array_sum_square - 
    # individual_square_sum) / 2 
    return (array_sum_square - 
            individual_square_sum) //2
n=int(input())
lst=list(map(int,input().split()))
x=findProductSum(lst,n)
print(x)

Fixed code:
def findProductSum(A, n): 
      
    # calculating array sum (a1 + a2 ... + an) 
    array_sum = 0
    for i in range(0, n, 1): 
        array_sum = array_sum + A[i] 
  
    # calcualting square of array sum 
    # (a1 + a2 + ... + an)^2 
    array_sum_square = array_sum * array_sum 
  
    # calcualting a1^2 + a2^2 + ... + an^2 
    individual_square_sum = 0
    for i in range(0, n, 1): 
        individual_square_sum += A[i] * A[i] 
  
    # required sum is (array_sum_square - 
    # individual_square_sum) / 2 
    return (array_sum_square - 
            individual_square_sum) //2
n=int(input())
M = 1000000007
lst=list(map(int,input().split()))
x=findProductSum(lst,n)
print(x%M)
Buggy code:
N = int(input())
A = list(map(int, input().split()))

M = 10**9 + 7

Total = sum(A) -A[0]

ans = 0

for i in range(N-1):
    ans += A[i] * Total
    ans % M
    Total -= A[i+1]

print(ans)

Fixed code:
N = int(input())
A = list(map(int, input().split()))

M = 10**9 + 7

Total = sum(A) -A[0]

ans = 0

for i in range(N-1):
    ans += A[i] * Total
    ans = ans % M
    Total -= A[i+1]

print(ans)
Buggy code:
n = input()
a_list = list(map(int, input().split()))
sum_ = 0
mod = 10 ** 9 + 7
for i in range(len(a_list) - 1):
  sum_ += ((a_list[i] % mod) * (a_list[i + 1] % mod)) % mod 
print(sum_ % mod)

Fixed code:
n = input()
a_list = list(map(int, input().split()))
ruisekiwa = [0] * (len(a_list) + 1) 
for i in range(len(a_list)):
    ruisekiwa[i + 1] = ruisekiwa[i] + a_list[i]
sum_ = 0
mod = 10 ** 9 + 7
for i in range(len(a_list)):
    sum_ += ((a_list[i] % mod) * ((ruisekiwa[-1] % mod) - (ruisekiwa[i + 1] % mod))) % mod
print(sum_ % mod)
Buggy code:
N=int(input())
A=list(map(int,input().split()))
mod=10**9+7
S=0
M=0
for i in A:
    S+=i
for i in A:
    M+=((S-i)*i)%mod
print(M//2%mod)

Fixed code:
N=int(input())
A=list(map(int,input().split()))
mod=10**9+7
S=0
M=0
for i in A:
    S+=i
for i in A:
    S-=i
    M+=(S*i)%mod
print(M%mod)
Buggy code:
n=int(input())
A=list(map(int,input().split()))
mod=10**9+7
s=sum(A)
ans=0
for a in A:
    ans += a*(s-a)
print((ans/2)%mod)

Fixed code:
n=int(input())
A=list(map(int,input().split()))
mod=10**9+7
s=sum(A)
ans=0
for a in A:
    ans += a*(s-a)
print((ans//2)%mod)