Compilare: main.cpp: In function 'int main()': main.cpp:18:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (note.size() < m) ~~~~~~~~~~~~^~~ main.cpp:22:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (!note.empty() && n - i >m - note.size() && sir[i] - '0' > note.top()) ~~~~~~^~~~~~~~~~~~~~~~ main.cpp:11:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%i %i\n", &n, &m); ^ main.cpp:14:25: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(sir, n + 1, f); ^