Compilare: user.cpp: In function ‘void preprocesare()’: user.cpp:68:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2; i <= 2 * E.size() + 10; ++i) ^ user.cpp:72:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<E.size(); ++i) ^ user.cpp:75:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<E.size(); ++i) ^ user.cpp: In function ‘void Euler(short unsigned int, short unsigned int)’: user.cpp:86:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[node].size(); ++i) { ^ user.cpp: In function ‘void Solve()’: user.cpp:32:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^ user.cpp: In function ‘void Read()’: user.cpp:93:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("concurs.in", "rt", stdin); ^ user.cpp:94:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("concurs.out", "wt", stdout); ^ user.cpp:95:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &M); ^ user.cpp:101:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &P[i]); ^ user.cpp:103:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^ user.cpp: In function ‘void Solve()’: user.cpp:48:33: warning: ‘yMax’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<pMax<<' '<<xMax<<' '<<yMax<<'\n'; ^ user.cpp:48:22: warning: ‘xMax’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<pMax<<' '<<xMax<<' '<<yMax<<'\n'; ^