Compilare: main.cpp: In function 'int main()': main.cpp:57:6: warning: unused variable 'val' [-Wunused-variable] int val, last = 0; ^~~ main.cpp:57:11: warning: unused variable 'last' [-Wunused-variable] int val, last = 0; ^~~~ main.cpp:49:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("livada.in", "r", stdin); ^ main.cpp:50:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("livada.out", "w", stdout); ^