Răspuns:
Explicație pas cu pas:
{1,2}, {1,3},{1,4},{1,5},{1,6},{1,7},{1,8},{1,9},{1,10},{2,3},{2,4},{2,5},{2,6},{2,7},{2,8},{2,9},{2,10},{3,4},{3,5},{3,6},{3,7},{3,8},{3,9},{3,10},{4,5},{4,6},{4,7},{4,8},{4,9},{4,10},{5,6},{5,7},{5,8},{5,9},{5,10},{6,7},{6,8},{6,9},{6,10},{7,8},{7,9},{7,10},{8,9},{8,10},{9,10}
