#!/home/porosya/.local/share/virtualenvs/checkio-VEsvC6M1/bin/checkio --domain=py run node-disconnected-users2

# https://py.checkio.org/mission/node-disconnected-users2/

# 
# END_DESC

def disconnected_users(net, users, source, crushes):
    return 0

if __name__ == '__main__':
    #These "asserts" using only for self-checking and not necessary for auto-testing
    assert disconnected_users([
        ['A', 'B'],
        ['B', 'C'],
        ['C', 'D']
    ], {
        'A': 10,
        'B': 20,
        'C': 30,
        'D': 40
    },
        'A', ['C']) == 70, "First"

    assert disconnected_users([
        ['A', 'B'],
        ['B', 'D'],
        ['A', 'C'],
        ['C', 'D']
    ], {
        'A': 10,
        'B': 0,
        'C': 0,
        'D': 40
    },
        'A', ['B']) == 0, "Second"

    assert disconnected_users([
        ['A', 'B'],
        ['A', 'C'],
        ['A', 'D'],
        ['A', 'E'],
        ['A', 'F']
    ], {
        'A': 10,
        'B': 10,
        'C': 10,
        'D': 10,
        'E': 10,
        'F': 10
    },
        'C', ['A']) == 50, "Third"

    print('Done. Try to check now. There are a lot of other tests')