Compilare: main.cpp: In function 'int main()': main.cpp:65:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (dr != v[tt[x]].size() - 1){ ~~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:21:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&n,&q); ^ main.cpp:23:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&tt[i]); ^ main.cpp:27:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%lld",&val[i]); ^ main.cpp:38:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%lld",&x,&y); ^ main.cpp:19:23: warning: 'mid' may be used uninitialized in this function [-Wmaybe-uninitialized] int n,q,i,x,st,dr,mid,poz,elem; ^~~