Compilare: user.cpp: In function 'int solve(int)': user.cpp:71: warning: statement has no effect user.cpp: In function 'int main()': user.cpp:100: warning: format '%d' expects type 'int*', but argument 2 has type 'char*' user.cpp:97: warning: unused variable 'st' user.cpp:97: warning: unused variable 'dr' user.cpp:97: warning: unused variable 't' user.cpp:123: warning: 'wmin' is used uninitialized in this function