Eroare de compilare: user.cpp:10:24: warning: integer overflow in expression [-Woverflow] const int oo = (1<<31)-1; ^ user.cpp: In function ‘int main()’: user.cpp:60:5: error: reference to ‘cin’ is ambiguous cin >> N >> M; ^ user.cpp:6:10: note: candidates are: std::ifstream cin ifstream cin( (file + ".in").c_str() ); ^ In file included from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:74:0, from user.cpp:1: /usr/include/c++/4.8/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^ user.cpp:64:13: error: reference to ‘cin’ is ambiguous cin >> c; ^ user.cpp:6:10: note: candidates are: std::ifstream cin ifstream cin( (file + ".in").c_str() ); ^ In file included from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:74:0, from user.cpp:1: /usr/include/c++/4.8/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^ user.cpp:80:13: error: reference to ‘cout’ is ambiguous cout << (char)(i + 'A' - 1); ^ user.cpp:7:10: note: candidates are: std::ofstream cout ofstream cout( (file + ".out").c_str() ); ^ In file included from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:74:0, from user.cpp:1: /usr/include/c++/4.8/iostream:61:18: note: std::ostream std::cout extern ostream cout; /// Linked to standard output ^ user.cpp:83:13: error: reference to ‘cout’ is ambiguous cout << (char)(i + 'a' - 1); ^ user.cpp:7:10: note: candidates are: std::ofstream cout ofstream cout( (file + ".out").c_str() ); ^ In file included from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:74:0, from user.cpp:1: /usr/include/c++/4.8/iostream:61:18: note: std::ostream std::cout extern ostream cout; /// Linked to standard output ^