Compilare: user.cpp: In function ‘int main()’: user.cpp:41:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < query[nr].size(); ++j) res[ query[nr][j].y ] = v[ query[nr][j].x ]; ^ user.cpp:5:11: warning: unused variable ‘second’ [-Wunused-variable] #define y second ^ user.cpp:20:15: note: in expansion of macro ‘y’ int i,j,x,y,nr,vf,M,Q; ^ user.cpp:22:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&M); ^ user.cpp:23:61: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i = 1; i <= M; ++i) fscanf(fin,"%d %d",&op[i],&t[i]); ^