Update fibonacci_fast.cpp to try to pass some CI test

EntongShi2004 · web-flow · commit cff62a126976 · 2024-11-23T13:30:53.000+08:00
diff --git a/math/fibonacci_fast.cpp b/math/fibonacci_fast.cpp
@@ -19,6 +19,7 @@
 #include <cstdio>     /// for standard IO
 #include <iostream>   /// for IO operations
 #include <cassert>    /// for assert
+#include <string>     /// for function about string
 
 /**
  * @brief Maximum Fibonacci number that can be computed
