Compilare: main.cpp: In function 'void dijkstra(int, long long int*, int*)': main.cpp:23:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<L[act].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:51:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(minn>da[i]+db[i]+dc[i]&&i!=a&&i!=b&&i!=c){ ~~~~^~~~~~~~~~~~~~~~~~