Compilare: main.cpp: In function 'bool cupl(int)': main.cpp:19:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adj[nod].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp:30:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adj[nod].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:47:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cuplaj.in","r",stdin); ^ main.cpp:48:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cuplaj.out","w",stdout); ^ main.cpp:52:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%i %i %i",&nl,&nr,&m); ^ main.cpp:56:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%i %i",&a,&b); ^