Compilare: main.cpp: In function 'int main()': main.cpp:94:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (sol.size() - 1 == m) ~~~~~~~~~~~~~~~^~~~ main.cpp:96:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol.size() - 1; ++i) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int getInt()': main.cpp:30:35: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buf, maxb, 1, f); ^ main.cpp:40:35: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buf, maxb, 1, f); ^