Compilare: main.cpp: In function 'int main()': main.cpp:55:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("lapte.in", "r", stdin); ^ main.cpp:56:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("lapte.out", "w", stdout); ^ main.cpp:75:16: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] ok(ans); ^