Compilare: user.cpp: In function ‘int main()’: user.cpp:14:27: warning: format ‘%d’ expects a matching ‘int*’ argument [-Wformat=] scanf("%d %d %d",&n,&m); ^ user.cpp:30:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<G[crt].size(); j++) ^ user.cpp:50:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<apm.size(); i++) printf("%d %d\n",apm[i].first,apm[i].second); ^ user.cpp:12:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.in","r",stdin); ^ user.cpp:13:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.out","w",stdout); ^ user.cpp:14:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&n,&m); ^ user.cpp:18:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&x,&y,&cost); ^