src.cpp: In function 'int main()':
src.cpp:21:30: error: 'stdin' was not declared in this scope
freopen("UCLNBCNN.INP", "r", stdin);
^
src.cpp:21:35: error: 'freopen' was not declared in this scope
freopen("UCLNBCNN.INP", "r", stdin);
^
src.cpp:22:29: error: 'stdout' was not declared in this scope
freopen("UCLNBCNN.OUT", "w",stdout);
^