Small cleanup

1 files changed, 8 insertions, 10 deletions

diff --git a/2023/05/5a.c b/2023/05/5a.c
index 15d2805..14b8c7c 100644
--- a/2023/05/5a.c
+++ b/2023/05/5a.c
@@ -1,26 +1,25 @@
 #include <inttypes.h>
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #define N 100
-
-bool isnum(char c) { return c >= '0' && c <= '9'; }
+#define ISNUM(c) (c >= '0' && c <= '9')
+#define MIN(x,y) ((x)<(y)?(x):(y))
 
 int main() {
         char *buf, line[N];
         int64_t i, m, ns, seed[N], next[N], r[3];
 
         for (ns = 0, buf = fgets(line, N, stdin); *buf; buf++) {
-                if (!isnum(*buf)) continue;
+                if (!ISNUM(*buf)) continue;
                 next[ns++] = atoll(buf);
-                while (isnum(*buf)) buf++;
+                while (ISNUM(*buf)) buf++;
         }
 
 
         while ((buf = fgets(line, N, stdin)) != NULL) {
-                if (!isnum(*buf)) {
+                if (!ISNUM(*buf)) {
                         memcpy(seed, next, ns * sizeof(int64_t));
                         fgets(line, N, stdin); /* Discard description */
                         continue;
@@ -28,7 +27,7 @@ int main() {
 
                 for (i = 0; *buf; buf++) {
                         r[i++] = atoll(buf);
-                        while (isnum(*buf)) buf++;
+                        while (ISNUM(*buf)) buf++;
                 }
 
                 for (i = 0; i < ns; i++)
@@ -36,9 +35,8 @@ int main() {
                                 next[i] = seed[i] + (r[0] - r[1]);
         }
 
-        m = next[0];
-        for (i = 1; i < ns; i++)
-                m = m > next[i] ? next[i] : m;
+        for (i = 1, m = next[0]; i < ns; i++)
+                m = MIN(m, next[i]);
 
         printf("%" PRId64 "\n", m);
         return 0;