Compilare: user.cpp: In function ‘int update(int, int, int)’: user.cpp:24:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int updatezero(int, int)’: user.cpp:32:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void solve()’: user.cpp:43:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,sol=0; ^