Compilare: user.cpp: In function 'void do_backtrack_dude(int, int, long long unsigned int, int)': user.cpp:16: warning: comparison between signed and unsigned integer expressions user.cpp:32: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void read()': user.cpp:52: warning: format '%d' expects type 'int*', but argument 2 has type 'long long unsigned int*' user.cpp:54: warning: comparison between signed and unsigned integer expressions user.cpp:56: warning: format '%d' expects type 'int*', but argument 2 has type 'long long unsigned int*' user.cpp: In function 'void solve()': user.cpp:66: warning: comparison between signed and unsigned integer expressions user.cpp:68: warning: comparison between signed and unsigned integer expressions