Buggy python submission (verdict: Time Limit Exceeded):
mod = 10 ** 9 + 7

s = input()
dp = [0] * 13
dp[0] = 1
for i in range(len(s)):
    dp2 = [0] * 13
    for j in range(10):
        if (s[i] == '?') | (s[i] == str(j)):
            for k in range(13):
                dp2[(10 * k + j) % 13] += dp[k]
                dp2[(10 * k + j) % 13] %= mod
    dp = dp2
print(dp[5])

Fixed submission:
mod = 10 ** 9 + 7

s = input()
dp = [0] * 13
dp[0] = 1
for i in range(len(s)):
    dp2 = [0] * 13
    for j in range(10):
        if (s[i] == '?') | (s[i] == str(j)):
            for k in range(13):
                dp2[(10 * k + j) % 13] += dp[k]
                dp2[(10 * k + j) % 13] %= mod
    dp = dp2
print(dp[5])

Buggy python submission (verdict: Time Limit Exceeded):
mod = 10 ** 9 + 7

s = input()
dp = [[0 for _ in range(13)] for _ in range(len(s) + 1)]
for i in range(len(s) - 1,  -1, -1):
    digit = len(s) - i - 1
    ddd = 10 ** digit
    if digit == 0:
        if s[i] != '?':
            dp[digit + 1][int(s[i])] += 1
        else:
            for j in range(10):
                dp[digit + 1][j] += 1    
    elif s[i] != '?':    
        s_i = (int(s[i]) * ddd) % 13
        for k in range(13):
            dp[digit + 1][(s_i + k) % 13] += dp[digit][k]
    else:        
        for j in range(10):
            s_i = (ddd * j) % 13
            for k in range(13):
                dp[digit + 1][(s_i + k) % 13] += dp[digit][k]
print(dp[len(s)][5] % mod)

Fixed submission:
mod = 10 ** 9 + 7

s = input()
dp = [0] * 13
dp[0] = 1
for i in range(len(s)):
    dp2 = [0] * 13
    for j in range(10):
        if (s[i] == '?') | (s[i] == str(j)):
            for k in range(13):
                dp2[(10 * k + j) % 13] += dp[k]
                dp2[(10 * k + j) % 13] %= mod
    dp = dp2
print(dp[5])

Buggy python submission (verdict: Time Limit Exceeded):
mod = 10 ** 9 + 7

s = input()
dp = [[0 for _ in range(13)] for _ in range(len(s) + 1)]
for i in range(len(s) - 1,  -1, -1):
    digit = len(s) - i - 1
    ddd = 10 ** digit
    if digit == 0:
        if s[i] != '?':
            dp[digit + 1][int(s[i])] += 1
        else:
            for j in range(10):
                dp[digit + 1][j] += 1    
    elif s[i] != '?':    
        s_i = (int(s[i]) * ddd) % 13
        for k in range(13):
            dp[digit + 1][(s_i + k) % 13] += dp[digit][k]
    else:        
        for j in range(10):
            s_i = (ddd * j) % 13
            for k in range(13):
                dp[digit + 1][(s_i + k) % 13] += dp[digit][k]
print(dp[len(s)][5] % mod)

Fixed submission:
mod = 10 ** 9 + 7

s = input()
dp = [0] * 13
dp[0] = 1
for i in range(len(s)):
    dp2 = [0] * 13
    for j in range(10):
        if (s[i] == '?') | (s[i] == str(j)):
            for k in range(13):
                dp2[(10 * k + j) % 13] += dp[k]
                dp2[(10 * k + j) % 13] %= mod
    dp = dp2
print(dp[5])

Buggy python submission (verdict: Runtime Error):
s = input()
count = 0
for i in range(n - 1):
    if s[i:i+2] == "??":
        count += 1
ans = count * 7
print(ans)

Fixed submission:
mod = 10 ** 9 + 7

s = input()
dp = [0] * 13
dp[0] = 1
for i in range(len(s)):
    dp2 = [0] * 13
    for j in range(10):
        if (s[i] == '?') | (s[i] == str(j)):
            for k in range(13):
                dp2[(10 * k + j) % 13] += dp[k]
                dp2[(10 * k + j) % 13] %= mod
    dp = dp2
print(dp[5])