Compilare: main.cpp: In function 'int main()': main.cpp:57:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<prim[l].size();j++) ~^~~~~~~~~~~~~~~ main.cpp:22:29: warning: unused variable 'x' [-Wunused-variable] int n,q,i,st,dr,l,d,sol,x; ^ main.cpp:24:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d\n",&n,&q); ^ main.cpp:49:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&st,&dr); ^