Compilare: main.cpp: In function 'int main()': main.cpp:18:9: warning: unused variable 'poz' [-Wunused-variable] int poz {}; ^~~ main.cpp:19:9: warning: unused variable 'neg' [-Wunused-variable] int neg {}; ^~~ main.cpp:7:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("flip.in","r",stdin); ^ main.cpp:8:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("flip.out","w",stdout); ^