Compilare: user.cpp: In function ‘void euler(int)’: user.cpp:21:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(poz[Nod] < Graph[Nod].size()){ ^ user.cpp: In function ‘int main()’: user.cpp:84:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < SOL[i].size(); ++j) ^ user.cpp:36:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("johnie.in", "r", stdin); ^ user.cpp:37:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("johnie.out", "w", stdout); ^ user.cpp:38:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:41:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &X, &Y); ^