./src/FLR.cpp:204:78: error: call of overloaded ‘abs(long long unsigned int)’ is ambiguous
jitter_out << abs((datas[i].first - datas[i - 1].first) / (inter));
^
In file included from /usr/include/c++/7/cstdlib:75:0,
from /usr/include/c++/7/ext/string_conversions.h:41,
from /usr/include/c++/7/bits/basic_string.h:6361,
from /usr/include/c++/7/string:52,
from /usr/include/c++/7/bits/locale_classes.h:40,
from /usr/include/c++/7/bits/ios_base.h:41,
from /usr/include/c++/7/ios:42,
from /usr/include/c++/7/ostream:38,
from /usr/include/c++/7/iostream:39,
from ./src/FLR.cpp:4: