Kindergarten

def minimize_rivalry_sum(n, rivalry_matrix):
    # Initialize dp table: dp[mask][i] will store the minimum rivalry sum
    # ending at i with visited nodes corresponding to the set bits of mask
    dp = [[float('inf')] * n for _ in range(1 << n)]
    dp[1][0] = 0  # Start at node 0 with only node 0 visited
    
    # Iterate over all possible states
    for mask in range(1 << n):
        for u in range(n):
            if dp[mask][u] == float('inf'):
                continue
            # Try to extend the path by visiting another unvisited node v
            for v in range(n):
                if mask & (1 << v) == 0:  # v is not visited in mask
                    next_mask = mask | (1 << v)
                    dp[next_mask][v] = min(dp[next_mask][v], dp[mask][u] + rivalry_matrix[u][v])
    
    # We need to find the minimum cost path that visits all nodes
    min_rivalry_sum = min(dp[(1 << n) - 1][i] for i in range(n))
    return min_rivalry_sum

# Input reading
n = int(input())
rivalry_matrix = []
for _ in range(n):
    rivalry_matrix.append(list(map(int, input().split())))

# Print the result
print(minimize_rivalry_sum(n, rivalry_matrix))

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