Compilare: user.cpp: In function ‘void dfs(int, long double, std::deque<std::pair<long double, long double> >&)’: user.cpp:40:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i == rez.size() - 1) ~~^~~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:65:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.cpp:67:29: 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:70:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &x); ^