Compilare: user.cpp: In function ‘int query(int, int)’: user.cpp:18:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind1 < G[t1].size() && ind2 < G[t2].size()){ ^ user.cpp:18:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind1 < G[t1].size() && ind2 < G[t2].size()){ ^ user.cpp:28:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind1 < G[t1].size()){ ^ user.cpp:32:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind2 < G[t2].size()){ ^ user.cpp:41:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(last < 1000000 && ind < v.size()){ ^ user.cpp:43:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind < v.size() && v[ind].first <= last + 1){ ^ user.cpp: In function ‘int main()’: user.cpp:66:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &n); ^ user.cpp:69:40: 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, &z); ^