Compilare: user.cpp: In function ‘void dijkstra()’: user.cpp:59:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( i = 0 ; i < L[cnod.second.first].size() ; i++ ) ^ user.cpp: In function ‘int main()’: user.cpp:72:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( j = 0 ; j < L[K[i]].size() ; j++ ) ^