Compilare: user.cpp: In function ‘int main()’: user.cpp:83:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i; j + 1 < Active.size(); j++) ~~~~~~^~~~~~~~~~~~~~~ user.cpp:89:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < Active.size() && check(Active[i], y)) i++; ~~^~~~~~~~~~~~~~~ user.cpp:55:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &n, &m); ^ user.cpp:57:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &v[i].y, &v[i].x); ^ user.cpp:59:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &w[i].y, &w[i].x); ^