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The Fibonacci sequence is a sequence of numbers starting from 1, where each number is the sum of the two previous numbers. You can compute sums with the + operator.

1, 1, 2, 3, 5, 8, 13, 21, ...

The alien on the left used the fifth number from this sequence (5) as its password, and the one on the right used the tenth Fibonacci number.

Use variables to calculate the password of each spaceship, then crash them into the mothership.

transmission
 
xxxxxxxxxx
 

SPACECODE

basics

1 run code 2 pick up fuel 3 fix code 4 go to the mothership 5 movement functions 6 avoid the asteroid 7 go to the fuel 8 asteroid field 9 fire missiles 10 clear asteroids 11 spaceship duel 12 you shall not pass 13 lay a mine 14 clear a path 15 pausing execution 16 stay hidden 17 ambush aliens 18 escape ambush 19 protect mothership 20 protect jets 21 linked spaceships 22 multiple spaceships 23 pick up all fuel 24 ambush mothership 25 outnumbered

mathematics

26 variables 27 variable puzzle 28 variable syntax 29 hacking 30 fibonacci 31 incrementing 32 brute force 33 augmented operator 34 increment decrement 35 operators 36 refuel the jet 37 modulus 38 refuel mothership 39 return value 40 rotate to 41 random numbers 42 random defense 43 max and min 44 pythagorean theorem 45 exponents 46 booleans 47 and or 48 number in range 49 mothership alarm 50 precision

branching

51 blocks 52 if statement 53 if flowchart 54 spaceship id 55 if defender 56 coordinate attack 57 ambush jets 58 meltdown 59 bomber attack 60 squeeze through 61 else statement 62 else flowchart 63 pick a target 64 bombers and fighters 65 lucky decision 66 avoid detection 67 quadrants 68 else if statement 69 else if flowchart 70 maze 71 clear the path 72 switch 73 break 74 default case 75 outnumbered

loops

76 while loop 77 infinite loop 78 count down 79 clear asteroids 80 curved path 81 trap the mothership 82 block the passage 83 cover me 84 fibonacci with loop 85 escape minefield 86 secret admirer 87 spiral path 88 multiple spirals 89 for loop 90 for loop hero 91 lines of mines 92 circle of mines 93 nested loop 94 rectangle minefield 95 triangle minefield 96 trapezoid minefield 97 diamond minefield 98 hack collatz 99 hack prime 100 do while

coming soon

101 strings & regex 126 objects 151 functions 176 arrays