Compilare: main.cpp: In function 'int main()': main.cpp:101:41: 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:102:43: 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(ll, int)': main.cpp:69:3: warning: 'f' may be used uninitialized in this function [-Wmaybe-uninitialized] if (cop > 1) { ^~