Compilare: user.cpp: In function ‘int dist(int, int, char, char)’: user.cpp:231:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] res += A[a][S[l+1]] + A[S[r-1]][b]; ^ user.cpp:231:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] res += A[a][S[l+1]] + A[S[r-1]][b]; ^ user.cpp:231:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] res += A[a][S[l+1]] + A[S[r-1]][b]; ^ user.cpp:231:38: warning: array subscript has type ‘char’ [-Wchar-subscripts] res += A[a][S[l+1]] + A[S[r-1]][b]; ^ user.cpp:233:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] res = A[a][b]; ^ user.cpp:233:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] res = A[a][b]; ^ user.cpp: In function ‘int analyze_consecutive(const std::vector<std::pair<std::pair<int, int>, std::pair<int, int> > >&)’: user.cpp:246:9: warning: variable ‘prev_sol’ set but not used [-Wunused-but-set-variable] pii prev_sol = v[i-1].fi; ^ user.cpp: In function ‘int main()’: user.cpp:150:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:320:5: note: in expansion of macro ‘re’ re (j, 26) ^ user.cpp:150:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:319:3: note: in expansion of macro ‘re’ re (i, 26) ^ user.cpp:324:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] prefix[i + 1] = prefix[i] + A[ S[i] ][ S[i+1] ]; ^ user.cpp:324:51: warning: array subscript has type ‘char’ [-Wchar-subscripts] prefix[i + 1] = prefix[i] + A[ S[i] ][ S[i+1] ]; ^ user.cpp:150:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:346:3: note: in expansion of macro ‘re’ re (i, size(par)) ^