Buggy python submission (verdict: Runtime Error):
from operator import itemgetter
tik = [[1,2],[7,3],[4,4],[5,5],[3,5],[2,5],[9,6],[8,7],[6,6]]
dic = {"1":2,"7":3,"4":4,"5":5,"3":5,"2":5,"9":6,"8":7,"6":6}

n,k = map(int, input().split())
x = list(map(int, input().split()))
inf = float("INF")
dp = [0]+[-1]*(n+10)
q = []
for i in range(k):
    q.append([x[i],dic[str(x[i])]])

q = sorted(q, key=itemgetter(1), reverse=False)

s = []
p=0
t = 0
for i in range(n):
    for j in range(k):
        if i+q[j][1] <=n:
            if dp[i]!=-1:
            
                if  dp[i]==0:
                    dp[i+q[j][1]] = q[j][0]
                else:dp[i+q[j][1]] = str(dp[i])+str(q[j][0])
        #if i+q[j][1] ==n:
            #print(dp[20])
s = list(dp[n])
s.sort()
s = s[::-1]
print(''.join(s))

Fixed submission:
from operator import itemgetter
tik = [[1,2],[7,3],[4,4],[5,5],[3,5],[2,5],[9,6],[8,7],[6,6]]
dic = {"1":2,"7":3,"4":4,"5":5,"3":5,"2":5,"9":6,"8":7,"6":6}

n,k = map(int, input().split())
x = list(map(int, input().split()))
dp = [0]+[-1]*(n+10)
q = []
for i in range(k):
    q.append([x[i],dic[str(x[i])]])

q = sorted(q, key=itemgetter(1), reverse=False)

s = []
p=0
t = 0
for i in range(n):
    for j in range(k):
        if i+q[j][1] <=n:
            if dp[i]!=-1:
            
                if  dp[i]==0:
                    ko = q[j][0]
                    dp[i+q[j][1]] = max(q[j][0],dp[i+q[j][1]])

                else:
                    ko = dp[i]+q[j][0]
                    dp[i+q[j][1]] = max(dp[i]*10+q[j][0], dp[i+q[j][1]])
        #if i+q[j][1] ==n:
            #print(dp[20])
s = list(str(dp[n]))
s.sort()
s = s[::-1]
print(''.join(s))

Buggy python submission (verdict: Runtime Error):
from operator import itemgetter
tik = [[1,2],[7,3],[4,4],[5,5],[3,5],[2,5],[9,6],[8,7],[6,6]]
dic = {"1":2,"7":3,"4":4,"5":5,"3":5,"2":5,"9":6,"8":7,"6":6}

n,k = map(int, input().split())
x = list(map(int, input().split()))
inf = float("INF")
dp = [0]+[-1]*(n+10)
q = []
for i in range(k):
    q.append([x[i],dic[str(x[i])]])

q = sorted(q, key=itemgetter(1), reverse=False)

s = []
p=0
t = 0
for i in range(n):
    for j in range(k):
        if i+q[j][1] <=n+10:
            if dp[i]!=-1:
            
                if  dp[i]==0:
                    dp[i+q[j][1]] = q[j][0]
                else:dp[i+q[j][1]] = str(dp[i])+str(q[j][0])
        #if i+q[j][1] ==n:
            #print(dp[20])
s = list(dp[n])
s.sort()
s = s[::-1]
print(''.join(s))


Fixed submission:
from operator import itemgetter
tik = [[1,2],[7,3],[4,4],[5,5],[3,5],[2,5],[9,6],[8,7],[6,6]]
dic = {"1":2,"7":3,"4":4,"5":5,"3":5,"2":5,"9":6,"8":7,"6":6}

n,k = map(int, input().split())
x = list(map(int, input().split()))
dp = [0]+[-1]*(n+10)
q = []
for i in range(k):
    q.append([x[i],dic[str(x[i])]])

q = sorted(q, key=itemgetter(1), reverse=False)

s = []
p=0
t = 0
for i in range(n):
    for j in range(k):
        if i+q[j][1] <=n:
            if dp[i]!=-1:
            
                if  dp[i]==0:
                    ko = q[j][0]
                    dp[i+q[j][1]] = max(q[j][0],dp[i+q[j][1]])

                else:
                    ko = dp[i]+q[j][0]
                    dp[i+q[j][1]] = max(dp[i]*10+q[j][0], dp[i+q[j][1]])
        #if i+q[j][1] ==n:
            #print(dp[20])
s = list(str(dp[n]))
s.sort()
s = s[::-1]
print(''.join(s))

Buggy python submission (verdict: Runtime Error):
from operator import itemgetter
tik = [[1,2],[7,3],[4,4],[5,5],[3,5],[2,5],[9,6],[8,7],[6,6]]
dic = {"1":2,"7":3,"4":4,"5":5,"3":5,"2":5,"9":6,"8":7,"6":6}

n,k = map(int, input().split())
x = list(map(int, input().split()))
inf = float("INF")
dp = [0]+[-1]*(n+10)
q = []
for i in range(k):
    q.append([x[i],dic[str(x[i])]])

q = sorted(q, key=itemgetter(1), reverse=False)

s = []
p=0
t = 0
for i in range(n):
    for j in range(k):
        if i+q[j][1] <=n+10000000:
            if dp[i]!=-1:
            
                if  dp[i]==0:
                    dp[i+q[j][1]] = q[j][0]
                else:dp[i+q[j][1]] = str(dp[i])+str(q[j][0])
        #if i+q[j][1] ==n:
            #print(dp[20])
s = list(dp[n])
s.sort()
s = s[::-1]
print(''.join(s))

Fixed submission:
from operator import itemgetter
tik = [[1,2],[7,3],[4,4],[5,5],[3,5],[2,5],[9,6],[8,7],[6,6]]
dic = {"1":2,"7":3,"4":4,"5":5,"3":5,"2":5,"9":6,"8":7,"6":6}

n,k = map(int, input().split())
x = list(map(int, input().split()))
dp = [0]+[-1]*(n+10)
q = []
for i in range(k):
    q.append([x[i],dic[str(x[i])]])

q = sorted(q, key=itemgetter(1), reverse=False)

s = []
p=0
t = 0
for i in range(n):
    for j in range(k):
        if i+q[j][1] <=n:
            if dp[i]!=-1:
            
                if  dp[i]==0:
                    ko = q[j][0]
                    dp[i+q[j][1]] = max(q[j][0],dp[i+q[j][1]])

                else:
                    ko = dp[i]+q[j][0]
                    dp[i+q[j][1]] = max(dp[i]*10+q[j][0], dp[i+q[j][1]])
        #if i+q[j][1] ==n:
            #print(dp[20])
s = list(str(dp[n]))
s.sort()
s = s[::-1]
print(''.join(s))

Buggy python submission (verdict: Runtime Error):
from operator import itemgetter
tik = [[1,2],[7,3],[4,4],[5,5],[3,5],[2,5],[9,6],[8,7],[6,6]]
dic = {"1":2,"7":3,"4":4,"5":5,"3":5,"2":5,"9":6,"8":7,"6":6}
n,k = map(int, input().split())
x = list(map(int, input().split()))
#print(x)
q = []
for i in range(k):
    q.append([x[i],dic[str(x[i])]])
#print(q)
q = sorted(q, key=itemgetter(1), reverse=False)
#print(q)
if (2 not in x or 7 not in x) and 4 in x and 6 in x:
    s = []
    p=0
    t = 0
    while n>0:
        #print(s)
        if n>=q[p][1]:
            n-=q[p][1]
            s.append(str(q[p][0]))
            t = 1
        elif t == 1:
            p+=1
            n+=int(dic[str(s[0])])
            s = s[1:]
        else:
            p+=1
else:

    s = []
    p=0
    t = 0
    while n>0:
        #print(s)
        if n>=q[p][1]:
            n-=q[p][1]
            s.append(str(q[p][0]))
            t = 1
        elif t == 1:
            n+=q[p][1]
            p+=1
            s.pop()
        else:
            p+=1

#print(s)
s.sort()
s=s[::-1]
print(''.join(s))

Fixed submission:
from operator import itemgetter
tik = [[1,2],[7,3],[4,4],[5,5],[3,5],[2,5],[9,6],[8,7],[6,6]]
dic = {"1":2,"7":3,"4":4,"5":5,"3":5,"2":5,"9":6,"8":7,"6":6}

n,k = map(int, input().split())
x = list(map(int, input().split()))
dp = [0]+[-1]*(n+10)
q = []
for i in range(k):
    q.append([x[i],dic[str(x[i])]])

q = sorted(q, key=itemgetter(1), reverse=False)

s = []
p=0
t = 0
for i in range(n):
    for j in range(k):
        if i+q[j][1] <=n:
            if dp[i]!=-1:
            
                if  dp[i]==0:
                    ko = q[j][0]
                    dp[i+q[j][1]] = max(q[j][0],dp[i+q[j][1]])

                else:
                    ko = dp[i]+q[j][0]
                    dp[i+q[j][1]] = max(dp[i]*10+q[j][0], dp[i+q[j][1]])
        #if i+q[j][1] ==n:
            #print(dp[20])
s = list(str(dp[n]))
s.sort()
s = s[::-1]
print(''.join(s))