Compilare: main.cpp: In function 'void dijkstra(int)': main.cpp:28:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); i ++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:105:4: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=0;i<fr;i++) ^~~ main.cpp:108:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(i = 1; i <= n; i ++) ^~~