Compilare: user.cpp: In function ‘int main()’: user.cpp:26:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[r].size();j++) ^ user.cpp:11:23: warning: unused variable ‘k’ [-Wunused-variable] int n,i,j,in,sf,x,y,r,k,p,q,sqq,l,s,sw,nr,pp; ^ user.cpp:11:27: warning: unused variable ‘q’ [-Wunused-variable] int n,i,j,in,sf,x,y,r,k,p,q,sqq,l,s,sw,nr,pp; ^ user.cpp:9:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] {freopen ("secv5.in","r",stdin); ^ user.cpp:10:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("secv5.out","w",stdout); ^ user.cpp:12:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&x,&y); ^ user.cpp:16:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&vec[i]); ^ user.cpp:65:18: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] s+=sf-p+1; ^