Compilare: main.cpp: In function 'void bfs(short int)': main.cpp:37:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < l[nod].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'short int dijkstra(short int, short int)': main.cpp:78:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < l[nod].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: At global scope: main.cpp:96:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] main() ^