Compilare: main.cpp: In function 'LL pinex()': main.cpp:58:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < factors.size(); j++) { ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:72:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pinex.in", "r", stdin); ^ main.cpp:73:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pinex.out", "w", stdout); ^ main.cpp:78:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ main.cpp:81:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %lld", &a, &b); ^