fix includes with help from include-what-you-use

examples/parallel/parallel.cpp

@@ -2,13 +2,20 @@
 // The clients submite requests to the server and they are processed in parallel.
 
 #include "common.h"
+#include "ggml.h"
 #include "llama.h"
+#include "sampling.h"
 
-#include <cmath>
+#include <algorithm>
+#include <cctype>
+#include <cstdint>
 #include <cstdio>
-#include <string>
-#include <vector>
+#include <cstdlib>
 #include <ctime>
+#include <istream>
+#include <string>
+#include <tuple>
+#include <vector>
 
 // trim whitespace from the beginning and end of a string
 static std::string trim(const std::string & str) {