Compilare: user.cpp: In function ‘int main()’: user.cpp:47:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind < v.size() && v[ind].second <= xg) ind++; ^ user.cpp:48:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ind < v.size() && v[ind].first == xg) P.push_back(con); ^ user.cpp:52:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind < v.size() && v[ind].first < xg + dx) add += v[ind].second - v[ind].first, ind++; ^ user.cpp:54:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ind < v.size() && v[ind].first == xg) P.push_back(con); ^ user.cpp:73:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind < w.size() && w[ind].second <= yg) ind++; ^ user.cpp:74:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ind < w.size() && w[ind].first == yg) P.push_back(con); ^ user.cpp:78:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind < w.size() && w[ind].first < yg + dy) add += w[ind].second - w[ind].first, ind++; ^ user.cpp:80:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ind < w.size() && w[ind].first == yg) P.push_back(con); ^ user.cpp:97:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i + 1 < P.size(); i++) if(P[i] == P[i + 1]) ans *= 2; ^ user.cpp:11:68: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d%d%d%d", &xparc, &yparc, &xg, &yg, &xpr, &ypr); ^ user.cpp:14:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &m); ^ user.cpp:17:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &a, &b); ^ user.cpp:21:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &n); ^ user.cpp:24:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &a, &b); ^