Two people take turns to report numbers, and each time they can only report 1 or 2, and add up all the numbers reported by the two people. Whoever reports the number and 50 wins. In order to ensure victory, if you are asked to sign up first, sign up for 2 the first time.

Think of the number that two people can report at a time as a group, each group has 2 numbers, and the sum is 3.

When the final distance is 3 to 50, the final number is infinite, and the winner is the first to report.

50-3=47

47/3= 15 Yu 2

You should report 2 first.