Compilare: main.cpp: In function 'int main()': main.cpp:123:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("nambartiori.in", "r", stdin); ^ main.cpp:124:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("nambartiori.out", "w", stdout); ^ main.cpp: In function 'void print(int, int)': main.cpp:112:16: warning: 'f' may be used uninitialized in this function [-Wmaybe-uninitialized] cout << f << " " << s << " "; ^~~