Compilare: user.cpp: In function 'void read()': user.cpp:22: warning: format '%d' expects type 'int*', but argument 2 has type 'long long int*' user.cpp: In function 'int solve()': user.cpp:32: warning: unused variable 'sum' user.cpp: In function 'int main()': user.cpp:31: warning: 'start' may be used uninitialized in this function user.cpp:31: note: 'start' was declared here