Compilare: user.cpp: In function ‘int main()’: user.cpp:22:15: warning: unused variable ‘j’ [-Wunused-variable] int n, i, j, s, t, d; ^ user.cpp:22:18: warning: unused variable ‘s’ [-Wunused-variable] int n, i, j, s, t, d; ^ user.cpp:22:21: warning: unused variable ‘t’ [-Wunused-variable] int n, i, j, s, t, d; ^ user.cpp:22:24: warning: unused variable ‘d’ [-Wunused-variable] int n, i, j, s, t, d; ^ user.cpp: In function ‘void Solve(int, int, int)’: user.cpp:42:15: warning: unused variable ‘cst’ [-Wunused-variable] int i, j, cst; ^ user.cpp: In function ‘int main()’: user.cpp:19:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dictree.in","r",stdin); ^ user.cpp:20:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dictree.out","w",stdout); ^ user.cpp:24:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d",&n ); ^ user.cpp:26:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%s",v[ i ].s ); ^