Compilare: user.cpp: In function 'int solve(int)': user.cpp:63: warning: statement has no effect user.cpp: In function 'int main()': user.cpp:93: warning: format '%d' expects type 'int*', but argument 2 has type 'char*' user.cpp:90: warning: unused variable 't' user.cpp:116: warning: 'wmin' is used uninitialized in this function