Compilare: user.cpp: In function 'std::bitset<20010u> expr()': user.cpp:86: warning: unused variable 'i' user.cpp: In function 'int main()': user.cpp:127: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[110100]' user.cpp:147: warning: format '%d' expects type 'int', but argument 2 has type 'long int' user.cpp:149: warning: format '%d' expects type 'int', but argument 2 has type 'long int'