Compilare: user.cpp: In function ‘int main()’: user.cpp:41:15: warning: unused variable ‘u’ [-Wunused-variable] int i,n,m,u,v,tv,tu,totalc,ma,x,y,c; ^ user.cpp:41:17: warning: unused variable ‘v’ [-Wunused-variable] int i,n,m,u,v,tv,tu,totalc,ma,x,y,c; ^ user.cpp:39:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.in","r",stdin); ^ user.cpp:40:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.out","w",stdout); ^ user.cpp:42:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:45:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x,&y,&c); ^