Compilare: user.cpp:12:25: warning: integer overflow in expression [-Woverflow] const int INF = (1<<31)-1; ^ user.cpp: In function ‘int main()’: user.cpp:129:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(it=V[c].begin(); it!=V[c].end(); it++) ^ user.cpp:129:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(it=V[c].begin(); it!=V[c].end(); it++) ^ user.cpp:131:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!F[c][*it]) continue; ^ user.cpp:134:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!Piece[a][b].first) continue; ^ user.cpp:134:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!Piece[a][b].first) continue; ^ user.cpp:135:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] j=--Piece[a][b].first; ^ user.cpp:135:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] j=--Piece[a][b].first; ^ user.cpp:136:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] j=Piece[a][b].second[j]; ^ user.cpp:136:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] j=Piece[a][b].second[j]; ^