Compilare: main.cpp: In function 'bool othersCover()': main.cpp:72:10: warning: unused variable 'res' [-Wunused-variable] bool res=false; ^~~ main.cpp: In function 'bool good(int)': main.cpp:156:10: warning: unused variable 'res' [-Wunused-variable] bool res=false; ^~~ main.cpp: In function 'int main()': main.cpp:214:36: 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); ^ main.cpp:216:38: 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); ^ main.cpp:220:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:236:39: 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); ^