Eroare de compilare: user.cpp: In function ‘double divide_et_impera(int, int)’: user.cpp:80:114: warning: operation on ‘r’ may be undefined [-Wsequence-point] s[left + (l - left) + (r - mid - 1)] = ((t[l].y < t[r].y and l < mid) or (r == right + 1))? t[l++]:t[r++]; ^ user.cpp:80:114: warning: operation on ‘l’ may be undefined [-Wsequence-point] user.cpp:96:31: error: call of overloaded ‘abs(double)’ is ambiguous if (abs(TMIDX - s[i].x) < best2) ^ user.cpp:96:31: note: candidates are: In file included from /usr/include/c++/4.8/cstdlib:72:0, from /usr/include/c++/4.8/ext/string_conversions.h:41, from /usr/include/c++/4.8/bits/basic_string.h:2815, from /usr/include/c++/4.8/string:52, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/ostream:38, from /usr/include/c++/4.8/iostream:39, from user.cpp:1: /usr/include/stdlib.h:771:12: note: int abs(int) extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur; ^ user.cpp:44:15: note: double abs(double) inline double abs(double x) ^ In file included from /usr/include/c++/4.8/random:38:0, from /usr/include/c++/4.8/bits/stl_algo.h:65, from /usr/include/c++/4.8/algorithm:62, from user.cpp:3: /usr/include/c++/4.8/cmath:91:3: note: constexpr long double std::abs(long double) abs(long double __x) ^ /usr/include/c++/4.8/cmath:87:3: note: constexpr float std::abs(float) abs(float __x) ^ /usr/include/c++/4.8/cmath:81:3: note: constexpr double std::abs(double) abs(double __x) ^ In file included from /usr/include/c++/4.8/ext/string_conversions.h:41:0, from /usr/include/c++/4.8/bits/basic_string.h:2815, from /usr/include/c++/4.8/string:52, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/ostream:38, from /usr/include/c++/4.8/iostream:39, from user.cpp:1: /usr/include/c++/4.8/cstdlib:174:3: note: long long int std::abs(long long int) abs(long long __x) { return __builtin_llabs (__x); } ^