src.cpp: In function 'int main()':
src.cpp:5:14: error: aggregate 'std::ifstream fin' has incomplete type and cannot be defined
ifstream fin; fin.open("LUYENTAP.INP");
^
src.cpp:6:14: error: aggregate 'std::ofstream fout' has incomplete type and cannot be defined
ofstream fout; fout.open("LUYENTAP.OUT");
^
src.cpp:17:42: error: 'min_element' was not declared in this scope
else fout<<*min_element(b+1,b+1+(x-1));
^