Compilare: user.cpp: In function ‘void Fill(int, int, int)’: user.cpp:45:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] start[finish[current]][current] = make_pair(l, c); ^ user.cpp: In function ‘int main()’: user.cpp:180:21: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] a[i][m + 1] = NULL; ^ user.cpp:158:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &n, &m); ^ user.cpp:160:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%s", a[i] + 1); ^ user.cpp:177:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mz.out", "w", stdout); ^