Compilare: user.cpp: In function ‘int cost(int, int)’: user.cpp:16:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0; k<v[i].size(); k++) ^ user.cpp: In function ‘void bellmanford()’: user.cpp:34:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<v[nod].size(); j++) ^ user.cpp: In function ‘int dijkstra()’: user.cpp:66:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<v[nod].size(); j++) ^ user.cpp: In function ‘int main()’: user.cpp:124:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v[fin].size(); i++) ^ user.cpp:131:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v[j].size(); i++) ^ user.cpp: In function ‘int cost(int, int)’: user.cpp:20:1: warning: control reaches end of non-void function [-Wreturn-type] } ^