Compilare: user.cpp: In function ‘int main()’: user.cpp:204:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < Range[i].size(); j ++) ^ user.cpp:184:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("heavypath.in" ,"r", stdin ); ^ user.cpp:185:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("heavypath.out","w", stdout); ^ user.cpp:187:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &NrNodes, &NrQuerys); ^ user.cpp:189:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &NodeValue[i]); ^ user.cpp:192:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &node1, &node2); ^ user.cpp:211:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d %d", &K, &X, &Y); ^