notes/school/di-ma/20181120_1-hamilton.dot

graph g {
    node [ shape="point" ];

    {
        rank="same";
        1;
        2;
    }
    {
        rank="same";
        3;
    }
    {
        rank="same";
        4;
        5;
    }

    1 -- 2;
    1 -- 3;
    2 -- 3;
    1 -- 4;
    4 -- 5;
    5 -- 1;
}