Compilare: main.cpp: In function 'void dijkstra(int)': main.cpp:46:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i!=g[node].size(); ++i) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:74:58: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] unite = vector <vector <int> >(4, vector <int>(1 << k+1)); ~^~ main.cpp:90:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1; i<=k+1; ++i) ^~~ main.cpp:92:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(int msk=1; msk<=1<<k; ++msk) ^~~