Compilare: main.cpp: In function 'int main()': main.cpp:33:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[base].size(); i++) ~^~~~~~~~~~~~~~~ main.cpp:38:9: warning: this 'else' clause does not guard... [-Wmisleading-indentation] else ^~~~ main.cpp:40:11: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else' arb[v[base][i].ft]=base; ^~~