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#include <stdio.h>
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#include "backtracking.h"
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#include "constraints.h"
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#include "solver/solve.h"
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#include "sudoku.h"
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int main(void) {
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struct sudoku grid;
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if (!parse_grid_file(&grid, stdin))
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return 1;
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solve_backtracking(&grid);
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print_grid(&grid, stdout);
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return !solved(&grid);
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}
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