Compilare: user.cpp: In function ‘int main()’: user.cpp:70:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < Active.size() && std::max(v[Active[i].A].x, v[Active[i].B].x) <= var) i++; ~~^~~~~~~~~~~~~~~ user.cpp:100:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i; j + 1 < Active.size(); j++) ~~~~~~^~~~~~~~~~~~~~~ user.cpp:110:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < Active.size() && std::max(v[Active[i].A].x, v[Active[i].B].x) <= var) i++; ~~^~~~~~~~~~~~~~~ user.cpp:119:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i; j + 1 < Active.size(); j++) ~~~~~~^~~~~~~~~~~~~~~ user.cpp:50:30: 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:52:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &v[i].x, &v[i].y); ^ user.cpp:54:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &w[i].x, &w[i].y); ^