Compilare: main.cpp:3:0: warning: ignoring #pragma GCC option [-Wunknown-pragmas] #pragma GCC option("arch=native","tune=native","no-zero-upper") main.cpp: In function 'int main()': main.cpp:51:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trans.in", "r", stdin); ^ main.cpp:52:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trans.out", "w", stdout); ^