update libflint, 2021-02

include/advent_math.h

@@ -1,7 +0,0 @@
-#ifndef ADVENT_MATH_H_
-#define ADVENT_MATH_H_
-
-int int_max(int, int);
-int int_min(int, int);
-
-#endif // ADVENT_MATH_H_

src/2015/02.c

@@ -3,7 +3,7 @@
 #include <string.h>
 
 #include "input.h"
-#include "advent_math.h"
+#include "math.h"
 
 void advent2015day02(void) {
     size_t sz = 0;
@@ -18,8 +18,8 @@ void advent2015day02(void) {
         t = strtok(NULL, "x");
         int h = atoi(t);
 
-        paper += 2 * l * w + 2 * w * h + 2 * h * l + int_min(w * l, int_min(l * h, h * w));
-        ribbon += l * w * h + int_min(w + w + h + h, int_min(h + h + l + l, l + l + w + w));
+        paper += 2 * l * w + 2 * w * h + 2 * h * l + min_int(w * l, min_int(l * h, h * w));
+        ribbon += l * w * h + min_int(w + w + h + h, min_int(h + h + l + l, l + l + w + w));
     }
 
     printf("%d\n%d\n", paper, ribbon);

src/2021/02.c

@@ -1,10 +1,55 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+#include <limits.h>
 
 #include "input.h"
 
-void advent2021day02(void) {
-  char *input = get_input("input/2021/02");
-  printf("Solution for Day 02 of 2021 is not completed yet\n");
-  free(input);
+static void solution(long p2) {
+  size_t sz = 0;
+  char **input = get_lines("input/2021/02", &sz);
+  long h = 0, d = 0, a = 0;
+
+  for (size_t i = 0; i < sz; ++i) {
+    size_t sp_sz = 0;
+    char **sp = split(input[i], &sp_sz, " ");
+    if (sp == NULL) {
+      printf("Failed to split\n");
+      exit(1);
+    }
+    const char *errstr;
+    long n = 0;
+    n = (long)strtonum(sp[1], LONG_MIN, LONG_MAX, &errstr);
+    if (errstr) {
+      printf("Failed to convert %s to long\n", sp[i]);
+      exit(1);
+    }
+
+    if (!p2) {
+      if (strcmp("forward", sp[0]) == 0) {
+        h += n;
+      } else if (strcmp("down", sp[0]) == 0) {
+        d += n;
+      } else {
+        d -= n;
+      }
+    } else {
+      if (strcmp("forward", sp[0]) == 0) {
+        h += n;
+        d += a * n;
+      } else if (strcmp("down", sp[0]) == 0) {
+        a += n;
+      } else {
+        a -= n;
+      }
+    }
+    free(sp);
+  }
+  printf("%ld\n", h * d);
+  del_lines(input);
+}
+
+void advent2021day02(void) {
+  solution(0);
+  solution(1);
 }

src/2021/03.c

@@ -1,10 +1,13 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "input.h"
 
 void advent2021day03(void) {
-  char *input = get_input("input/2021/03");
-  printf("Solution for Day 03 of 2021 is not completed yet\n");
-  free(input);
+  size_t sz;
+  char **input = get_lines("input/2021/03", &sz);
+
+
+  del_lines(input);
 }

src/advent_math.c

@@ -1,9 +0,0 @@
-#include "advent_math.h"
-
-int int_max(int a, int b) {
-    return a > b ? a : b;
-}
-
-int int_min(int a, int b) {
-    return a < b ? a : b;
-}