import sys
input = sys.stdin.readline

N=int(input())
C=[list(map(int,input().split())) for i in range(N)]

DP=dict()
ANS=[1<<60]

def calc(A,f,c):
    if (A,f) in DP and DP[A,f]<c:
        return

    if sum(A)==2*N:
        ANS[0]=min(ANS[0],c)
        return
    if sum(A)==2*N-1:
        x=A.index(1)
        if x==f:
            ANS[0]=min(ANS[0],c)
            return
            
    
    X=list(A)
    for i in range(N):
        if i==f:
            continue
        if X[i]==2:
            continue

        X[i]+=1
        if (tuple(X),i) in DP:
            if DP[tuple(X),i]>c+C[f][i]:
                DP[tuple(X),i]=c+C[f][i]
                Q.append((tuple(X),i,DP[tuple(X),i]))
        else:
            DP[tuple(X),i]=c+C[f][i]
            Q.append((tuple(X),i,DP[tuple(X),i]))
        X[i]-=1

A=[0]*N
Q=[]
for i in range(N):
    A[i]+=1
    Q.append((tuple(A),i,0))
    A[i]-=1

while Q:
    A,f,c=Q.pop()
    calc(A,f,c)

print(ANS[0])