N = int(input())
C = []
for i in range(N):
    C.append(list(map(int, input().split())))
    
inf = 10 ** 18
N2 = 1 << (2 * N)
dp = [[inf] * N for i in range(N2)]
for i in range(N):
    dp[1 << i][i] = 0
    
for s in range(1, N2):
    for p in range(N):
        if (s >> p) & 1 == 0:
            continue
        for q in range(N):
            if p == q:
                continue
            if (s >> q) & 1 and (s >> (q + N)) & 1:
                continue
            # if (s >> (p + N)) & 1:
            #     ns = s ^ (1 << (p + N))
            # else:
            #     ns = s ^ (1 << p)
            if (s >> q) & 1 == 0:
                ns = s | (1 << q)
                dp[ns][q] = min(dp[ns][q], dp[s][p] + C[p][q])
            else:
                ns = s | (1 << (q + N))
                dp[ns][q] = min(dp[ns][q], dp[s][p] + C[p][q])
            
ans = min(dp[-1])
for i in range(N):
    ans = min(ans, dp[(N2 - 1)^(1 << (i + N))][i])
print(ans)