diff --git a/main.cpp b/main.cpp
index 7b1145b..129f554 100644
--- a/main.cpp
+++ b/main.cpp
@@ -2,7 +2,6 @@
 #include <boost/filesystem.hpp>
 #include <vector>
 #include <string>
-#include <algorithm>
 #include <set>
 
 #define   K_VISION_DIR   "/hard/k_vision"
@@ -137,8 +136,8 @@ long long get_file_timestamp(const std::string& strPath)
     }
     fs::path path(strPath);    
     str = path.filename().string();
-    auto strTime = str.substr(0, 14);
-    std::remove(strTime.begin(), strTime.end(), '_');
+    auto strTime = str.substr(0, 15);
+    strTime.erase(8, 1);
     return std::atoll(strTime.c_str());
 }