Eroare de compilare: user.cpp:4:12: error: variable ‘std::ifstream in’ has initializer but incomplete type ifstream in("matrix.in"); ^ user.cpp:5:13: error: variable ‘std::ofstream out’ has initializer but incomplete type ofstream out("matrix.out"); ^ user.cpp: In function ‘int main()’: user.cpp:20:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] arr[c]++; ^ user.cpp:23:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(arr[c]) ^ user.cpp:34:74: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(dp[i][j]-dp[i-m][j]-dp[i][j-m]+dp[i-m][j-m]!=arr[c]) ^