advent2021

commit e69485eb4aa4d214d8d2464c32ff9810a9c85fac
parent 92f03e4de6d97806719d0d9601ac993ed0f9dde3
Author: bsandro <[email protected]>
Date:   Thu,  9 Dec 2021 09:22:10 +0200

Slight optimization of d8p2 (no snprintf)

Diffstat:
M
day08/puzzle.c
 | 
6
++----

1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/day08/puzzle.c b/day08/puzzle.c
@@ -82,17 +82,15 @@ void puzzle(const char *filename, long long *result1, long long *result2) {
 
 		deduce_digits(digits);
 
-		unsigned short answers[PUZZLE_NUMBERS];
-		char answers_str[PUZZLE_NUMBERS + 1];
+		char answers_str[PUZZLE_NUMBERS + 1] = {0};
 		for (int i = 0; i < PUZZLE_NUMBERS; ++i) {
 			struct digit_t *digit = get_by_segments(digits, puzzles[i]);
 			assert(digit != NULL);
-			answers[i] = digit->digit;
+			answers_str[i] = digit->digit + '0';
 			if (digit->digit == 1 || digit->digit == 4 || digit->digit == 7 || digit->digit == 8) {
 				(*result1)++;
 			}
 		}
-		snprintf(answers_str, PUZZLE_NUMBERS + 1, "%d%d%d%d", answers[0], answers[1], answers[2], answers[3]);
 		unsigned long solution = atol(answers_str);
 
 		*result2 += solution;