Compilare: user.cpp: In function ‘int main()’: user.cpp:70:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < pts[i].size(); j++) { ~~^~~~~~~~~~~~~~~ user.cpp:74:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < qry[i].size(); j++) { ~~^~~~~~~~~~~~~~~ user.cpp:41:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d " ,&x,&y,&q); ^ user.cpp:44:51: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d %d " ,&x1,&y1,&x2,&y2); ^