Compilare: user.cpp: In function 'int main()': user.cpp:50: warning: comparison between signed and unsigned integer expressions user.cpp:95: warning: format '%lld' expects type 'long long int', but argument 2 has type 'int' user.cpp: In function 'int Solve(int)': user.cpp:103: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:48: warning: 'P' may be used uninitialized in this function