Must Come Down

Problem

Print all integers starting from 100 and count down to 0. The count should include both 100 and 0.

5. Must come down, Comet 64

Solution 1

This solution is straightforward. We start at 100. Use a loop to print the current integer, then decrement the integer. Exit the loop when the integer is negative.

int = 100;                // Start at 100.
loop:                     // Start of "loop".
    output = int;         // Print the integer.
    int--;                // Decrement the integer by 1.
    check int < 0;        // Is integer < 0?
    jump if true: end;    // If so, go to "end".
    jump if false: loop;  // Otherwise, go to "loop".
end:                      // End of program.

Solution 2

Similar to Solution 1. However, we keep on printing integers to output. The program stops as soon as the game detects we have printed the required number of integers. This solution is optimal, according to the game.

int = 100;          // Start at 100.
loop:               // Start of "loop".
    output = int;   // Print the integer.
    int--;          // Decrement the integer by 1.
    jump to: loop;  // Go to "loop".

Solution 3

The register int is initially zero. Subtract the content of int from 100, which yields the next integer to be printed. Increment the content of int. We do not need an explicit loop because the game loops back to the start of the program once it has read the last line of code. This solution is optimal, according to the game.

reg = 100 - int;  // Subtract content of int from 100.
output = reg;     // Print the result of the subtraction.
int++;            // Increment int.