Calculate when input parameter combination will match with loop iteration indexes

Question

I have 3 integer as input: a, b and c. I'm trying to create a function to calculate the number progress at which a match will occur.

I used the following code to output the number and then the combination of input numbers. I'm trying to create a function where I can input a, b, and, c and it will return the progress for which x==a,y==bandz==c`.

int progress = 0;
for (int x = 0; x <= 160; x++) {
    for (int y = 0; y <= 160; y++) {
        for (int z = 0; z <= 160; z++) {
            progress++;
            System.out.println(progress + " " + x + " " + y + " " + z);
        }
    }
}

It's just an example. What I'm trying to figure out is a formula for determining the point at which a combination of values would come up in a loop. — bber, Jul 26 '18 at 10:12
@bber For that you can just check x,y and z values where your have currently put print statement — Aman Chhabra, Jul 26 '18 at 10:13
I understand, but I'm just looking for a math formula right now, nothing else. A "combination of values" as in an x y z combo. — bber, Jul 26 '18 at 10:16
do you want to get the possible permutation of the 3 numbers entered by the user? you may want to look at this https://stackoverflow.com/questions/5505927/how-to-generate-a-random-permutation-in-java — Angel Koh, Jul 26 '18 at 10:18
No. I want to be able to put in a combo of x, y, and z and it inputs out a value. An example would be putting in 40 40 102. That would output 1043383 from the formula. — bber, Jul 26 '18 at 10:20
how can 40 40 102 and 1043383 be related to each other? what would an expected output look like? — Instinct, Jul 26 '18 at 10:22

jhamon · Accepted Answer · 2018-07-26T14:35:49.330

0

Your formula is:

progress = 1 + z_iterations
progress = 1 + z + 161*y_iterations
progress = 1 + z + 161*( y + 161*x_iterations )
progress = 1 + z + 161*( y + 161*x )

Final form:

progress = 1 + z + 161*y + 25921*x

You method should be:

public int computeProgress (int a, int b, int c) {
    return 1 + c + 161*b + 25921*a;
}

edited Jul 26 '18 at 14:35

answered Jul 26 '18 at 12:53

jhamon

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Calculate when input parameter combination will match with loop iteration indexes

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