Compilare: user.cpp: In function ‘int main()’: user.cpp:31:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[i] = dp[best[v[i].first]] + 1; ^ user.cpp:32:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] bk[i] = best[v[i].first]; ^ user.cpp:33:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] best[v[i].second] = MAXDP(best[v[i].second], i); ^ user.cpp:33:51: warning: array subscript has type ‘char’ [-Wchar-subscripts] best[v[i].second] = MAXDP(best[v[i].second], i); ^ user.cpp:7:27: note: in definition of macro ‘MAXDP’ #define MAXDP(a, b) ((dp[(a)] > dp[(b)])?(a):(b)) ^ user.cpp:33:51: warning: array subscript has type ‘char’ [-Wchar-subscripts] best[v[i].second] = MAXDP(best[v[i].second], i); ^ user.cpp:7:43: note: in definition of macro ‘MAXDP’ #define MAXDP(a, b) ((dp[(a)] > dp[(b)])?(a):(b)) ^ user.cpp:17:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("text3.in", "r", stdin); ^ user.cpp:18:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("text3.out", "w", stdout); ^