Compilare: user.cpp: In function ‘int main()’: user.cpp:44:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v[a].size(); ++i) ^ user.cpp:52:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v[a].size(); ++i) ^ user.cpp:69:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(auto it:v[node]) ^ user.cpp:70:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(curr-w[it].s>0 && d[node][curr]+w[it].f<d[it][curr-w[it].s]) ^ user.cpp:70:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(curr-w[it].s>0 && d[node][curr]+w[it].f<d[it][curr-w[it].s]) ^ user.cpp:70:52: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(curr-w[it].s>0 && d[node][curr]+w[it].f<d[it][curr-w[it].s]) ^ user.cpp:70:60: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(curr-w[it].s>0 && d[node][curr]+w[it].f<d[it][curr-w[it].s]) ^ user.cpp:70:71: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(curr-w[it].s>0 && d[node][curr]+w[it].f<d[it][curr-w[it].s]) ^ user.cpp:72:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[it][curr-w[it].s]=d[node][curr]+w[it].f; ^ user.cpp:72:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[it][curr-w[it].s]=d[node][curr]+w[it].f; ^ user.cpp:72:43: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[it][curr-w[it].s]=d[node][curr]+w[it].f; ^ user.cpp:72:55: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[it][curr-w[it].s]=d[node][curr]+w[it].f; ^ user.cpp:73:39: warning: array subscript has type ‘char’ [-Wchar-subscripts] q.push(mp(it,curr-w[it].s)); ^