Buggy python submission (verdict: Runtime Error):
#!/usr/bin/env python3
import sys


def solve(N: int, K: int, D: "List[int]"):
    ln = list(map(int, list(str(N))))
    c = 0
    
    for i in range(len(ln)-1,-1,-1):
        ln[i] += c
        while(ln[i] in D):
            ln[i] += 1
        c = ln[i] // 10
        ln[i] %= 10

    if(c > 0):
        l = [c] + l

    print(''.join(map(str, ln)))

    return


# Generated by 1.1.6 https://github.com/kyuridenamida/atcoder-tools  (tips: You use the default template now. You can remove this line by using your custom template)
def main():
    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    N = int(next(tokens))  # type: int
    K = int(next(tokens))  # type: int
    D = [int(next(tokens)) for _ in range(K)]  # type: "List[int]"
    solve(N, K, D)

if __name__ == '__main__':
    main()


Fixed submission:
#!/usr/bin/env python3
import sys


def solve(N: int, K: int, D: "List[int]"):
    
    while(True):
        nl = list(map(int,list(str(N))))
        f = True
        for i in range(len(nl)):
            if(nl[i] in D):
                f = False
        if(f):
            print(N)
            exit()
        else:
            N += 1

    return


# Generated by 1.1.6 https://github.com/kyuridenamida/atcoder-tools  (tips: You use the default template now. You can remove this line by using your custom template)
def main():
    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    N = int(next(tokens))  # type: int
    K = int(next(tokens))  # type: int
    D = [int(next(tokens)) for _ in range(K)]  # type: "List[int]"
    solve(N, K, D)

if __name__ == '__main__':
    main()

Buggy python submission (verdict: Runtime Error):
#!/usr/bin/env python3
import sys


def solve(N: int, K: int, D: "List[int]"):
    ln = list(map(int, list(str(N))))
    c = 0
    for i in range(len(ln)-1,-1,-1):
        ln[i] += c
        while(ln[i] in D):
            ln[i] += 1
        c = ln[i] // 10
        ln[i] %= 10

    if(c > 0):
        ln.appendleft(c)

    print(''.join(map(str, ln)))

    return


# Generated by 1.1.6 https://github.com/kyuridenamida/atcoder-tools  (tips: You use the default template now. You can remove this line by using your custom template)
def main():
    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    N = int(next(tokens))  # type: int
    K = int(next(tokens))  # type: int
    D = [int(next(tokens)) for _ in range(K)]  # type: "List[int]"
    solve(N, K, D)

if __name__ == '__main__':
    main()


Fixed submission:
#!/usr/bin/env python3
import sys


def solve(N: int, K: int, D: "List[int]"):
    
    while(True):
        nl = list(map(int,list(str(N))))
        f = True
        for i in range(len(nl)):
            if(nl[i] in D):
                f = False
        if(f):
            print(N)
            exit()
        else:
            N += 1

    return


# Generated by 1.1.6 https://github.com/kyuridenamida/atcoder-tools  (tips: You use the default template now. You can remove this line by using your custom template)
def main():
    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    N = int(next(tokens))  # type: int
    K = int(next(tokens))  # type: int
    D = [int(next(tokens)) for _ in range(K)]  # type: "List[int]"
    solve(N, K, D)

if __name__ == '__main__':
    main()

Buggy python submission (verdict: Runtime Error):
#!/usr/bin/env python3
import sys


def solve(N: int, K: int, D: "List[int]"):
    ln = list(map(int, list(str(N))))
    c = 0
    for i in range(len(ln)-1,-1,-1):

        while(ln[i] in D):
            ln[i] += 1
        c = ln[i] // 10
        ln[i] %= 10

    if(c > 0):
        ln.appendleft(c)

    print(''.join(map(str, ln)))

    return


# Generated by 1.1.6 https://github.com/kyuridenamida/atcoder-tools  (tips: You use the default template now. You can remove this line by using your custom template)
def main():
    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    N = int(next(tokens))  # type: int
    K = int(next(tokens))  # type: int
    D = [int(next(tokens)) for _ in range(K)]  # type: "List[int]"
    solve(N, K, D)

if __name__ == '__main__':
    main()


Fixed submission:
#!/usr/bin/env python3
import sys


def solve(N: int, K: int, D: "List[int]"):
    
    while(True):
        nl = list(map(int,list(str(N))))
        f = True
        for i in range(len(nl)):
            if(nl[i] in D):
                f = False
        if(f):
            print(N)
            exit()
        else:
            N += 1

    return


# Generated by 1.1.6 https://github.com/kyuridenamida/atcoder-tools  (tips: You use the default template now. You can remove this line by using your custom template)
def main():
    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    N = int(next(tokens))  # type: int
    K = int(next(tokens))  # type: int
    D = [int(next(tokens)) for _ in range(K)]  # type: "List[int]"
    solve(N, K, D)

if __name__ == '__main__':
    main()