Compilare: user.cpp: In function 'void readf()': user.cpp:22: warning: format '%lld' expects type 'long long int*', but argument 2 has type 'long int*' user.cpp:22: warning: format '%lld' expects type 'long long int*', but argument 3 has type 'long int*' user.cpp:26: warning: format '%lld' expects type 'long long int*', but argument 2 has type 'long int*' user.cpp: In function 'void writef()': user.cpp:88: warning: format '%lld' expects type 'long long int', but argument 2 has type 'long int' user.cpp:89: warning: format '%lld' expects type 'long long int', but argument 2 has type 'long int' user.cpp: In function 'void solve()': user.cpp:59: warning: 'k' may be used uninitialized in this function