Code golf this function to be a lot shorter. You only get points if it's <300 bytes (not counting whitespace). Keep the function named `count`.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | 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; } |
Code golf this function to be a lot shorter. You only get points if it's <300 bytes (not counting whitespace). Keep the function named `count`.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | 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; } |
Here is a code-golfed version of the provided function in C, condensed to under 300 bytes (excluding whitespace):
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | int count() { int c = 0; for (int i = 0; i < 1<<16; i++) { unsigned long a = i, t = a; for (int j = 1; j < 7; j++) { for (int k = 1; k < 7; k++) { int p = j * 8 + k, s = 0; s += (t >> (p-8)) & 1; s += (t >> (p-1)) & 1; s += (t >> (p+1)) & 1; s += (t >> (p+8)) & 1; if (s == 0 && (t >> p) & 1) a &= ~(1UL << p); } } c += (a == t); } return c; } |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | int count() { int c = 0; for (int i = 0; i < 1<<16; i++) { unsigned long a = i, t = a; for (int j = 1; j < 7; j++) { for (int k = 1; k < 7; k++) { int p = j * 8 + k, s = 0; s += (t >> (p-8)) & 1; s += (t >> (p-1)) & 1; s += (t >> (p+1)) & 1; s += (t >> (p+8)) & 1; if (s == 0 && (t >> p) & 1) a &= ~(1UL << p); } } c += (a == t); } return c; } |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | int count() { int c = 0; for (int i = 0; i < 1<<16; i++) { unsigned long a = i, t = a; for (int j = 1; j < 7; j++) { for (int k = 1; k < 7; k++) { int p = j * 8 + k, s = 0; s += (t >> (p-8)) & 1; s += (t >> (p-1)) & 1; s += (t >> (p+1)) & 1; s += (t >> (p+8)) & 1; if (s == 0 && (t >> p) & 1) a &= ~(1UL << p); } } c += (a == t); } 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"); } |
Wrong answer; got 44352 instead of 27488.
Testing if the previous output contains the string All tests passed
: False
Resulting in output: True