Compilare: user.cpp: In function ‘bool dfs(long double)’: user.cpp:40:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i == rez[nod].size() - 1) ~~^~~~~~~~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:67:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.cpp:69:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &val[i]); ^ user.cpp:72:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &x); ^