Compilare: user.cpp: In function ‘void Euler(int, int)’: user.cpp:12:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[nod].size(); ++i) { ^ user.cpp: In function ‘int main()’: user.cpp:35:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < e.size(); ++i) ^ user.cpp:38:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < e.size(); ++i) { ^ user.cpp:44:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < e.size(); ++i) ^ user.cpp:45:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i + (1 << (j - 1)) <= e.size()) ^ user.cpp:23:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &n, &m); ^ user.cpp:29:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &x); ^ user.cpp:49:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &x, &y); ^