Compilare: user.cpp: In function ‘void init()’: user.cpp:53:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i<G[1].size(); i++) ^ user.cpp: In function ‘void solve()’: user.cpp:69:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i<G[nod_nou].size(); ++i) ^ user.cpp: In function ‘void write()’: user.cpp:78:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i<sol.size(); i++) ^ user.cpp: In function ‘void read()’: user.cpp:37:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:41:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &c); ^