35 lines
677 B
C
35 lines
677 B
C
#include "solve.h"
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#include <stddef.h>
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#include "constraints.h"
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#include "internals.h"
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#include "sudoku.h"
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static void init_possibilities(bool possibilities[9][9][9]) {
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for (size_t i = 0; i < 9; ++i) {
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for (size_t j = 0; j < 9; ++j) {
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for (size_t n = 0; n < 9; ++n) {
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possibilities[i][j][n] = true;
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}
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}
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}
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}
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bool solve(struct sudoku *grid) {
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if (!grid)
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return false;
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bool possibilities[9][9][9];
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init_possibilities(possibilities);
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bool changed;
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do {
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changed = false;
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changed |= update_sets(grid, possibilities);
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} while (changed);
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return solved(grid);
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}
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