Eroare de compilare: user.cpp: In function ‘long long int solve(int)’: user.cpp:6: error: expected initializer before ‘long’ user.cpp:8: error: ‘d’ was not declared in this scope user.cpp:10: error: ‘now’ was not declared in this scope user.cpp:14: error: ‘sol’ was not declared in this scope user.cpp:17: error: ‘sol’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:24: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:25: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result