Compilare: user.cpp: In function ‘int rlo(int, int)’: user.cpp:8:11: warning: unused variable ‘y’ [-Wunused-variable] int x,y; ^ user.cpp: In function ‘int main()’: user.cpp:25:15: warning: unused variable ‘m’ [-Wunused-variable] int n,i,j,m,ans,x,c1,c2,q; ^ user.cpp:23:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ubergraf.in","r",stdin); ^ user.cpp:24:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ubergraf.out","w",stdout); ^ user.cpp:27:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&p); ^