Eroare de compilare: user.cpp: In function ‘void preprocess(std::pair<int, int>*, int&, int)’: user.cpp:38:24: error: call of overloaded ‘abs(int)’ is ambiguous ans[abs(S[b] - S[a])] = make_pair(a + 1, b); ^ user.cpp:38:24: note: candidates are: In file included from /usr/local/include/c++/4.8.0/cstdlib:72:0, from /usr/local/include/c++/4.8.0/ext/string_conversions.h:41, from /usr/local/include/c++/4.8.0/bits/basic_string.h:2817, from /usr/local/include/c++/4.8.0/string:52, from /usr/local/include/c++/4.8.0/bitset:47, from user.cpp:3: /usr/include/stdlib.h:766:12: note: int abs(int) extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur; ^ user.cpp:19:12: note: int abs(const int&) inline int abs(const int &val){if(val > 0)return val; return -val;} ^ In file included from /usr/local/include/c++/4.8.0/ext/string_conversions.h:41:0, from /usr/local/include/c++/4.8.0/bits/basic_string.h:2817, from /usr/local/include/c++/4.8.0/string:52, from /usr/local/include/c++/4.8.0/bitset:47, from user.cpp:3: /usr/local/include/c++/4.8.0/cstdlib:174:3: note: long long int std::abs(long long int) abs(long long __x) { return __builtin_llabs (__x); } ^ /usr/local/include/c++/4.8.0/cstdlib:166:3: note: long int std::abs(long int) abs(long __i) { return __builtin_labs(__i); } ^