修改目录结构，优化CMakeLists

src/374.c

@@ -0,0 +1,52 @@
+#include <leetcode/utils.h>
+#include <stdio.h>
+
+static int pick = 0;
+
+/**
+ * Forward declaration of guess API.
+ * @param  num   your guess
+ * @return 	     -1 if num is higher than the picked number
+ *			      1 if num is lower than the picked number
+ *               otherwise return 0
+ * int guess(int num);
+ */
+int guess(int num)
+{
+    if (num > pick)
+        return -1;
+    if (num < pick)
+        return 1;
+    return 0;
+}
+
+int guessNumber(int n)
+{
+    int low = 1, high = n;
+    while (low < high)
+    {
+        int res = guess((low + high) / 2);
+        if (res == -1)
+            high = (n + 1) / 2;
+        else if (res == 1)
+            low = (low + high) / 2;
+        else
+            return res;
+    }
+
+    return high + guess(high);
+}
+
+int main()
+{
+    pick = 6;
+    ASSERT(guessNumber(10), pick, fail);
+
+    pick = 1;
+    ASSERT(guessNumber(2), pick, fail);
+
+    return 0;
+
+fail:
+    return -1;
+}