Initial Query

Code golf this function to be a lot shorter. You only get points if it's <200 bytes (not counting whitespace). Keep the function named `count`.

int count() {
    int ROWS = 8;
    int COLS = 8;
    int count = 0;
    for (int i = 0; i < 1<<16; i++) {
        long long unsigned int array = ((i & 0xf) << 9) | ((i & 0xf0) << (9 + 8 - 4)) | ((i & 0xf00) << (9 + 8 - 4 + 8 - 4)) | ((i & 0xf000) << (9 + 8 - 4 + 8 - 4 + 8 - 4));
        long long unsigned int init = array;

    long long unsigned int temp = array;

    for (int i = 1; i < ROWS - 1; i++) {
        for (int j = 1; j < COLS - 1; j++) {
            // Calculate bit positions
            int pos = i * COLS + j;
            int topPos = (i - 1) * COLS + j;
            int leftPos = i * COLS + (j - 1);
            int bottomPos = (i + 1) * COLS + j;
            int rightPos = i * COLS + (j + 1);

            // Get the values of the neighbors
            int cell = (temp >> pos) & 1;
            int top = (temp >> topPos) & 1;
            int left = (temp >> leftPos) & 1;
            int bottom = (temp >> bottomPos) & 1;
            int right = (temp >> rightPos) & 1;

            // Sum the values of the neighbors
            int sum = top + left + bottom + right;

            // Update the cell if all neighbors are 0 and the cell itself is 1
            if (sum == 0 && cell == 1) {
                array &= ~(1ULL << pos);
            }
        }
    }

        count += (init == array);
    }
    return count;
}

LLM Generation

Query

Code golf this function to be a lot shorter. You only get points if it's <200 bytes (not counting whitespace). Keep the function named `count`.

int count() {
    int ROWS = 8;
    int COLS = 8;
    int count = 0;
    for (int i = 0; i < 1<<16; i++) {
        long long unsigned int array = ((i & 0xf) << 9) | ((i & 0xf0) << (9 + 8 - 4)) | ((i & 0xf00) << (9 + 8 - 4 + 8 - 4)) | ((i & 0xf000) << (9 + 8 - 4 + 8 - 4 + 8 - 4));
        long long unsigned int init = array;

    long long unsigned int temp = array;

    for (int i = 1; i < ROWS - 1; i++) {
        for (int j = 1; j < COLS - 1; j++) {
            // Calculate bit positions
            int pos = i * COLS + j;
            int topPos = (i - 1) * COLS + j;
            int leftPos = i * COLS + (j - 1);
            int bottomPos = (i + 1) * COLS + j;
            int rightPos = i * COLS + (j + 1);

            // Get the values of the neighbors
            int cell = (temp >> pos) & 1;
            int top = (temp >> topPos) & 1;
            int left = (temp >> leftPos) & 1;
            int bottom = (temp >> bottomPos) & 1;
            int right = (temp >> rightPos) & 1;

            // Sum the values of the neighbors
            int sum = top + left + bottom + right;

            // Update the cell if all neighbors are 0 and the cell itself is 1
            if (sum == 0 && cell == 1) {
                array &= ~(1ULL << pos);
            }
        }
    }

        count += (init == array);
    }
    return count;
}

Output

// Original size: Around 700 bytes (counting non-whitespace chars)
// Golfed version (non-portable, assumes long is 64-bit): 183 bytes

count(){int c=0,i=0,k;long a,M=~0L/255,IM=0x7e7e7e7e7e7e00;for(;i<1<<16;i++){a=0;for(k=4;k--;)a|=1L*(i>>k*4&0xf)<<9+k*8;c+=!((a&~((a>>8)|(a<<8)|((a>>1)&~(M<<7))|((a<<1)&~M)))&IM);}return c;}

**Explanation of Changes and Golfing Techniques:** 1. **Removed Original Variables:** `ROWS`, `COLS`, `temp`, `init` were removed. Constants `8` were implicitly used in bit shifts. `init` was removed by changing the check from `init == array` to checking if the modification step results in zero change (`!change_mask`). 2. **Optimized Update Logic:** Instead of nested loops checking each cell, the entire grid update is done using bitwise operations: * `a >> 8`, `a << 8`: Get states of neighbors above/below. * `(a >> 1) & ~(M << 7)`, `(a << 1) & ~M`: Get states of neighbors left/right, masking out wrap-around across edges. `M = ~0L / 255` creates the column 0 mask (`0x0101...`). `M << 7` creates the column 7 mask (`0x8080...`). * `nb = (a>>8)|(a<<8)|...`: Combines all neighbor states. `a & ~nb` finds cells that are 1 (`a`) and have no neighbors set (`~nb`). * `IM = 0x7e7e7e7e7e7e00`: Mask for the inner 6x6 grid (rows 1-6, cols 1-6). `0x7e` is `01111110`. * `(a & ~nb) & IM`: Finds the isolated '1's within the inner 6x6 grid that need to be cleared. * `c += !(...)`: Increments the counter `c` if the mask of bits to be cleared is zero (i.e., no change occurred). 3. **Optimized Initialization:** The complex bit-shifting initialization was replaced with a small loop: * `for(k=4;k--;)a|=1L*(i>>k*4&0xf)<<9+k*8;`: This iterates 4 times (for k=3, 2, 1, 0). In each iteration, it takes a 4-bit nibble from `i` (`i >> k*4 & 0xf`), promotes it to `long` using `1L*` (necessary to ensure the large shift `<< 9+k*8` operates on a 64-bit value), shifts it to the correct starting position (9, 17, 25, 33), and ORs it into `a`. This is significantly shorter than the original explicit shifts and masks. 4. **Shorter Types/Variables:** * Used `int` for loop counters `i`, `k` and the result `c`. * Used `long` for the 64-bit grid state `a` and masks `M`, `IM`. **Note:** This assumes `long` is 64 bits, which is common on 64-bit systems but not guaranteed by the C standard. For guaranteed portability, `unsigned long long` would be needed, increasing the size slightly above 200 bytes (to 219 bytes). * Used short variable names (`c`, `i`, `k`, `a`, `M`, `IM`). 5. **K&R Style Definition:** `count(){...}` saves 3 bytes over `int count(){...}`. 6. **Combined Declarations:** Declared multiple variables of the same type on one line. 7. **Optimized Constants:** `M=~0L/255` is shorter than writing the full `0x0101...` constant. `IM` is used as a literal hex constant. 8. **Loop Structure:** Used `for(;i<1<<16;i++)` and `for(k=4;k--;)`. Using `i--` loop didn't save bytes here. 9. **Removed Whitespace:** All unnecessary whitespace is removed for the byte count. The resulting code is 183 bytes (excluding whitespace), satisfying the < 200 bytes requirement, but relies on the non-portable assumption that `long` is 64 bits.

Extract Code

I extracted the following code from that output:

// Original size: Around 700 bytes (counting non-whitespace chars)
// Golfed version (non-portable, assumes long is 64-bit): 183 bytes

count(){int c=0,i=0,k;long a,M=~0L/255,IM=0x7e7e7e7e7e7e00;for(;i<1<<16;i++){a=0;for(k=4;k--;)a|=1L*(i>>k*4&0xf)<<9+k*8;c+=!((a&~((a>>8)|(a<<8)|((a>>1)&~(M<<7))|((a<<1)&~M)))&IM);}return c;}

Check if all of the following conditions are true:

Run Code Interpreter

Running the following program:

// Original size: Around 700 bytes (counting non-whitespace chars)
// Golfed version (non-portable, assumes long is 64-bit): 183 bytes

count(){int c=0,i=0,k;long a,M=~0L/255,IM=0x7e7e7e7e7e7e00;for(;i<1<<16;i++){a=0;for(k=4;k--;)a|=1L*(i>>k*4&0xf)<<9+k*8;c+=!((a&~((a>>8)|(a<<8)|((a>>1)&~(M<<7))|((a<<1)&~M)))&IM);}return c;}



#include<stdio.h>
#include<stdlib.h>

int main() {


int answer = count();
int expected = 27488;
if (answer != expected) {
    printf("Wrong answer; got %d instead of %d.\n", answer, expected);
    exit(1);
}
printf("All tests passed\n");
}

And got the output:

Wrong answer; got 22946 instead of 27488.
main.c:5:1: warning: return type defaults to 'int' [-Wimplicit-int]
    5 | count(){int c=0,i=0,k;long a,M=~0L/255,IM=0x7e7e7e7e7e7e00;for(;i<1<<16;i++){a=0;for(k=4;k--;)a|=1L*(i>>k*4&0xf)<<9+k*8;c+=!((a&~((a>>8)|(a<<8)|((a>>1)&~(M<<7))|((a<<1)&~M)))&IM);}return c;}
      | ^~~~~

Substring Evaluation

Testing if the previous output contains the string All tests passed: False

PyFunc

Resulting in output: False