Compilare: user.cpp: In function ‘void preprocesare()’: user.cpp:72:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2; i <= 2 * E.size() + 10; ++i) ^ user.cpp:76:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<E.size(); ++i) ^ user.cpp:79:31: 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:90:33: 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:36:30: 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:97:39: 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:98:41: 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:99:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &M); ^ user.cpp:106:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &P[i]); ^ user.cpp:108:30: 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:52:33: warning: ‘yMax’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<pMax<<' '<<xMax<<' '<<yMax<<'\n'; ^ user.cpp:52:22: warning: ‘xMax’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<pMax<<' '<<xMax<<' '<<yMax<<'\n'; ^