Compilare: user.cpp: In function ‘void dijkstra()’: user.cpp:7:22: warning: integer overflow in expression [-Woverflow] #define inf ((1<<31)-1) ^ user.cpp:24:14: note: in expansion of macro ‘inf’ d[i]=inf; ^ user.cpp:28:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < G[node].size() ; ++ i) ^ user.cpp: In function ‘int main()’: user.cpp:45:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( unsigned int i = 1 ; i <= n ; ++ i) ^ user.cpp:47:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( unsigned int i = 1 , a, b, c ; i <= m ; ++ i) ^