Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np

def search(now,r,dist,ans):
    if len(r)==0:
        return ans
    min_=float('inf')
    for i,x in enumerate(r):
        if i < len(r)-1:
            min_=min(min_,search(x,r[:i]+r[i+1:],dist,ans+dist[now][x]))
        else:
            min_=min(min_, search(x,r[:i],dist,ans+dist[now][x]))
    return min_

N,M,R=list(map(int,input().split()))
r=list(map(int,input().split()))
r=[x-1 for x in r]
dist=[[float('inf') for _ in range(N)] for _ in range(N)]
for i in range(M):
    A,B,C=list(map(int,input().split()))
    dist[A-1][B-1]=C
    dist[B-1][A-1]=C
for i in range(N):
    dist[i][i]=0
dist=np.array(dist)

ans=float('inf')
for k in range(N):
    for i in range(N):
        for j in range(N):
            dist[i][j]=min(dist[i][j],dist[i][k]+dist[k][j])

ans=float('inf')
for i,x in enumerate(r):
    if i < len(r)-1:
        ans=min(ans, search(x,r[:i]+r[i+1:],dist,0))
    else:
        ans=min(ans, search(x,r[:i],dist,0))
if ans==float('inf'):
    print(0)
else:
    print(int(ans))

Fixed submission:
from itertools import permutations
from scipy.sparse.csgraph import floyd_warshall as ws

def search(r,dist,ans):
    sum_=0
    for i in range(1,len(r)):
        sum_+=dist[r[i-1]][r[i]]
    return sum_

N,M,R=list(map(int,input().split()))
r=list(map(int,input().split()))
r=[x-1 for x in r]
dist=[[float('inf') for _ in range(N)] for _ in range(N)]
for i in range(M):
    A,B,C=list(map(int,input().split()))
    dist[A-1][B-1]=C
    dist[B-1][A-1]=C
for i in range(N):
    dist[i][i]=0
dist=ws(dist)

ans=float('inf')

ans=float('inf')
r=permutations(r)
for x in r:
    ans=min(ans,search(x,dist,0))
print(int(ans))

Buggy python submission (verdict: Runtime Error):
import numpy as np

def search(now,r,dist,ans):
    if len(r)==0:
        return ans
    min_=float('inf')
    for i,x in enumerate(r):
        if i < len(r)-1:
            min_=min(min_,search(x,r[:i]+r[i+1:],dist,ans+dist[now][x]))
        else:
            min_=min(min_, search(x,r[:i],dist,ans+dist[now][x]))
    return min_

N,M,R=list(map(int,input().split()))
r=list(map(int,input().split()))
r=[x-1 for x in r]
dist=[[float('inf') for _ in range(N)] for _ in range(N)]
for i in range(M):
    A,B,C=list(map(int,input().split()))
    dist[A-1][B-1]=C
    dist[B-1][A-1]=C
for i in range(N):
    dist[i][i]=0
dist=np.array(dist)

ans=float('inf')
for i in range(N):
    for j in range(N):
        dist[i][j]=min(dist[i]+dist[j])

ans=float('inf')
for i,x in enumerate(r):
    if i < len(r)-1:
        ans=min(ans, search(x,r[:i]+r[i+1:],dist,0))
    else:
        ans=min(ans, search(x,r[:i],dist,0))
if ans==float('inf'):
    print(0)
else:
    print(int(ans)

Fixed submission:
from itertools import permutations
from scipy.sparse.csgraph import floyd_warshall as ws

def search(r,dist,ans):
    sum_=0
    for i in range(1,len(r)):
        sum_+=dist[r[i-1]][r[i]]
    return sum_

N,M,R=list(map(int,input().split()))
r=list(map(int,input().split()))
r=[x-1 for x in r]
dist=[[float('inf') for _ in range(N)] for _ in range(N)]
for i in range(M):
    A,B,C=list(map(int,input().split()))
    dist[A-1][B-1]=C
    dist[B-1][A-1]=C
for i in range(N):
    dist[i][i]=0
dist=ws(dist)

ans=float('inf')

ans=float('inf')
r=permutations(r)
for x in r:
    ans=min(ans,search(x,dist,0))
print(int(ans))

Buggy python submission (verdict: Runtime Error):
import numpy as np

def search(now,r,dist,ans):
    if len(r)==0:
        return ans
    min_=float('inf')
    for i,x in enumerate(r):
        if i < len(r)-1:
            min_=min(min_,search(x,r[:i]+r[i+1:],dist,ans+dist[now][x]))
        else:
            min_=min(min_, search(x,r[:i],dist,ans+dist[now][x]))
    return min_

N,M,R=list(map(int,input().split()))
r=list(map(int,input().split()))
r=[x-1 for x in r]
dist=[[float('inf') for _ in range(N)] for _ in range(N)]
for i in range(M):
    A,B,C=list(map(int,input().split()))
    dist[A-1][B-1]=C
    dist[B-1][A-1]=C
for i in range(N):
    dist[i][i]=0
dist=np.array(dist)

ans=float('inf')
for i in range(N):
    for j in range(N):
        dist[i][j]=min(dist[i]+dist[j])

ans=float('inf')
for i,x in enumerate(r):
    if i < len(r)-1:
        ans=min(ans, search(x,r[:i]+r[i+1:],dist,0))
    else:
        ans=min(ans, search(x,r[:i],dist,0))
print(int(ans))

Fixed submission:
from itertools import permutations
from scipy.sparse.csgraph import floyd_warshall as ws

def search(r,dist,ans):
    sum_=0
    for i in range(1,len(r)):
        sum_+=dist[r[i-1]][r[i]]
    return sum_

N,M,R=list(map(int,input().split()))
r=list(map(int,input().split()))
r=[x-1 for x in r]
dist=[[float('inf') for _ in range(N)] for _ in range(N)]
for i in range(M):
    A,B,C=list(map(int,input().split()))
    dist[A-1][B-1]=C
    dist[B-1][A-1]=C
for i in range(N):
    dist[i][i]=0
dist=ws(dist)

ans=float('inf')

ans=float('inf')
r=permutations(r)
for x in r:
    ans=min(ans,search(x,dist,0))
print(int(ans))

Buggy python submission (verdict: Runtime Error):
import numpy as np

def search(now,r,dist,ans):
    print(r,ans)
    if len(r)==0:
        return ans
    min_=float('inf')
    for i,x in enumerate(r):
        if i < len(r)-1:
            min_=min(min_,search(x,r[:i]+r[i+1:],dist,ans+dist[now][x]))
        else:
            min_=min(min_, search(x,r[:i],dist,ans+dist[now][x]))
    return min_

N,M,R=list(map(int,input().split()))
r=list(map(int,input().split()))
r=[x-1 for x in r]
dist=[[float('inf') for _ in range(N)] for _ in range(N)]
for i in range(M):
    A,B,C=list(map(int,input().split()))
    dist[A-1][B-1]=C
    dist[B-1][A-1]=C
for i in range(N):
    dist[i][i]=0
dist=np.array(dist)

ans=float('inf')
for i in range(N):
    for j in range(N):
        dist[i][j]=min(dist[i]+dist[j])
print(dist)
ans=float('inf')
for i,x in enumerate(r):
    if i < len(r)-1:
        ans=min(ans, search(x,r[:i]+r[i+1:],dist,0))
    else:
        ans=min(ans, search(x,r[:i],dist,0))
print(int(ans))

Fixed submission:
from itertools import permutations
from scipy.sparse.csgraph import floyd_warshall as ws

def search(r,dist,ans):
    sum_=0
    for i in range(1,len(r)):
        sum_+=dist[r[i-1]][r[i]]
    return sum_

N,M,R=list(map(int,input().split()))
r=list(map(int,input().split()))
r=[x-1 for x in r]
dist=[[float('inf') for _ in range(N)] for _ in range(N)]
for i in range(M):
    A,B,C=list(map(int,input().split()))
    dist[A-1][B-1]=C
    dist[B-1][A-1]=C
for i in range(N):
    dist[i][i]=0
dist=ws(dist)

ans=float('inf')

ans=float('inf')
r=permutations(r)
for x in r:
    ans=min(ans,search(x,dist,0))
print(int(ans))