1 + 2 - 3 + 4 - 5 + 6 - 7 + 8 - 9 + 10, 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10, 1+2+3+4+5+6+7+8+9+10, [1; 2]; [3; 4]; [5; 6]; [7; 8]; [9; 10], 1 2 3 4 5 6 7 8 9 10