init commit

3sem/cnts/contest6/03.c

@@ -0,0 +1,36 @@
+#include <stdlib.h>
+
+struct s1
+{
+    char f1;
+    long long f2;
+    char f3;
+};
+
+struct s2
+{
+    char f1;
+    char f3;
+    long long f2;
+};
+
+size_t
+compactify(void *ptr, size_t size)
+{
+    if (size == 0) {
+        return 0;
+    }
+
+    size_t count = size / sizeof(struct s1);
+    struct s1 *src = (struct s1 *) ptr;
+    struct s2 *dst = (struct s2 *) ptr;
+
+    for (size_t i = 0; i < count; ++i) {
+        struct s1 tmp = src[i];
+        dst[i].f1 = tmp.f1;
+        dst[i].f3 = tmp.f3;
+        dst[i].f2 = tmp.f2;
+    }
+
+    return count * sizeof(struct s2);
+}