Compilare: user.cpp: In function ‘int main()’: user.cpp:85:43: warning: array subscript has type ‘char’ [-Wchar-subscripts] edge[i].cos += p5 * cost[ch[j]]; ^ user.cpp: In function ‘int fin(int)’: user.cpp:52:1: warning: control reaches end of non-void function [-Wreturn-type] } ^