Compilare: user.cpp: In function ‘bool othersCover()’: user.cpp:36:10: warning: unused variable ‘res’ [-Wunused-variable] bool res=false; ^ user.cpp: In function ‘bool good(int)’: user.cpp:78:10: warning: unused variable ‘res’ [-Wunused-variable] bool res=false; ^ user.cpp: In function ‘int main()’: user.cpp:107:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("patrate.in","r",stdin); ^ user.cpp:108:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("patrate.out","w",stdout); ^ user.cpp:110:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:118:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&v[i].x,&v[i].y); ^