Compilare: main.cpp: In function 'void dfs1(int, int)': main.cpp:16:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i<v[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:38:22: warning: array subscript has type 'char' [-Wchar-subscripts] cost = c[s[0]] + c[s[1]]*5 + c[s[2]]*25 + c[s[3]]*125; ^ main.cpp:38:32: warning: array subscript has type 'char' [-Wchar-subscripts] cost = c[s[0]] + c[s[1]]*5 + c[s[2]]*25 + c[s[3]]*125; ^ main.cpp:38:44: warning: array subscript has type 'char' [-Wchar-subscripts] cost = c[s[0]] + c[s[1]]*5 + c[s[2]]*25 + c[s[3]]*125; ^ main.cpp:38:57: warning: array subscript has type 'char' [-Wchar-subscripts] cost = c[s[0]] + c[s[1]]*5 + c[s[2]]*25 + c[s[3]]*125; ^