2 files changed, 51 insertions, 0 deletions
diff --git a/rushs/evalexpr/hill_array/hill_array.c b/rushs/evalexpr/hill_array/hill_array.c
new file mode 100644
index 0000000..14d3a85
--- /dev/null
+++ b/rushs/evalexpr/hill_array/hill_array.c
@@ -0,0 +1,43 @@
+#include "hill_array.h"
+
+int top_of_the_hill(int tab[], size_t len)
+{
+    if (len == 0)
+    {
+        return -1;
+    }
+
+    int top = 0;
+    size_t i = 0;
+
+    while (i + 1 < len && tab[i] <= tab[i + 1])
+    {
+        if (tab[i] < 0 || tab[i + 1] < 0)
+        {
+            return -1;
+        }
+        if (tab[i] != tab[i + 1])
+        {
+            top = i + 1;
+        }
+        i++;
+    }
+
+    while (i + 1 < len && tab[i] >= tab[i + 1])
+    {
+        if (tab[i] < 0 || tab[i + 1] < 0)
+        {
+            return -1;
+        }
+        i++;
+    }
+
+    if (i + 1 == len)
+    {
+        return top;
+    }
+    else
+    {
+        return -1;
+    }
+}
diff --git a/rushs/evalexpr/hill_array/hill_array.h b/rushs/evalexpr/hill_array/hill_array.h
new file mode 100644
index 0000000..3152c19
--- /dev/null
+++ b/rushs/evalexpr/hill_array/hill_array.h
@@ -0,0 +1,8 @@
+#ifndef HILL_ARRAY_H
+#define HILL_ARRAY_H
+
+#include <stddef.h>
+
+int top_of_the_hill(int tab[], size_t len);
+
+#endif /* !HILL_ARRAY_H */