Problem 6:

13000 (by number_of_common_friends): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
18000 (by number_of_common_friends): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
35000 (by number_of_common_friends): [4230, 7670, 8080, 10520, 10530, 13310, 21030, 27140, 50530, 65760]
69000 (by number_of_common_friends): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
74000 (by number_of_common_friends): [4230, 7670, 8080, 10520, 10530, 13310, 21030, 27140, 35000, 50530]
90000 (by number_of_common_friends): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
96000 (by number_of_common_friends): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
128000 (by number_of_common_friends): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
175000 (by number_of_common_friends): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
213000 (by number_of_common_friends): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
249000 (by number_of_common_friends): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
298000 (by number_of_common_friends): [2070, 4230, 5540, 14630, 28050, 38600, 60680, 60700, 72810, 73790]
307000 (by number_of_common_friends): [13250, 14570, 18120, 20850, 30380, 30520, 46050, 46310, 59820, 76810]
387000 (by number_of_common_friends): [27140, 103970, 109780, 282660, 503000, 90, 110, 260, 840, 850]
426000 (by number_of_common_friends): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
503000 (by number_of_common_friends): [27140, 103970, 109780, 282660, 387000, 90, 110, 260, 840, 850]
513000 (by number_of_common_friends): [4230, 5540, 62560, 76920, 76980, 77300, 77330, 109780, 273650, 396330]

Problem 7:

13000 (by influence): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
18000 (by influence): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
35000 (by influence): [4230, 7670, 8080, 10520, 10530, 13310, 21030, 27140, 50530, 65760]
69000 (by influence): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
74000 (by influence): [4230, 7670, 8080, 10520, 10530, 13310, 21030, 27140, 35000, 50530]
90000 (by influence): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
96000 (by influence): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
128000 (by influence): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
175000 (by influence): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
213000 (by influence): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
249000 (by influence): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
298000 (by influence): [2070, 4230, 5540, 14630, 28050, 38600, 60680, 60700, 72810, 73790]
307000 (by influence): [13250, 14570, 18120, 20850, 30380, 30520, 46050, 46310, 59820, 76810]
387000 (by influence): [27140, 103970, 109780, 282660, 503000, 4230, 7670, 8080, 10520, 10530]
426000 (by influence): [90, 110, 260, 840, 850, 2070, 2440, 2660, 2800, 2860]
503000 (by influence): [27140, 103970, 109780, 282660, 387000, 4230, 7670, 8080, 10520, 10530]
513000 (by influence): [60720, 72450, 95990, 96110, 265830, 453370, 453380, 453400, 453480, 62560]

Problem 8:

Same: 14
Different: 3