STL & GNU C++ with codeblocks

If we are using STL program in codeblocks, we have to enable GNU c++ option

by selecting



Project->Build options->Have g++ follow the coming C++ 0x ISO C++

language standard [-std =c++0x]



Otherwise it wont compile in codeblocks editor. while submitting the

same code in codeforces.com, we have to select

GNU C++0x4 option for uploading the cpp file.