Compilare: user.cpp: In function ‘int main()’: user.cpp:41:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j,k,t; ^ user.cpp:41:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,k,t; ^ user.cpp:41:13: warning: unused variable ‘k’ [-Wunused-variable] int i,j,k,t; ^ user.cpp: In function ‘int solve()’: user.cpp:13:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:15:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x[i]); ^ user.cpp: In function ‘int main()’: user.cpp:42:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subgeom.in","r",stdin); ^ user.cpp:43:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subgeom.out","w",stdout); ^ user.cpp:44:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (scanf("%d",&t);t;t--) ^