1 files changed, 4 insertions, 10 deletions

diff --git a/2023/06/6a.c b/2023/06/6a.c
index 25a85e5..b3c0ba1 100644
--- a/2023/06/6a.c
+++ b/2023/06/6a.c
@@ -2,30 +2,24 @@
 
 #include <inttypes.h>
 #include <math.h>
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 
 #define N 100000
-
-#define MIN(a, b) ((a)<(b)?(a):(b))
-#define MAX(a, b) ((a)>(b)?(a):(b))
-
-bool isnum(char c) { return c >= '0' && c <= '9'; }
+#define ISNUM(c) (c >= '0' && c <= '9')
 
 int64_t readl(int64_t nums[], char *buf) {
         int64_t i;
         for (i = 0; *buf; buf++) {
-                if (!isnum(*buf)) continue;
+                if (!ISNUM(*buf)) continue;
                 nums[i++] = atoll(buf);
-                while (isnum(*buf)) buf++;
+                while (ISNUM(*buf)) buf++;
         }
         return i;
 }
 
 int main() {
-        char line[N], clean[N];
+        char line[N];
         int64_t i, n, p, D, x1, x2, t[N], d[N];
 
         n = readl(t, fgets(line, N, stdin));