Compilare: user.cpp: In function ‘int calc(int, int)’: user.cpp:34:21: warning: variable ‘node2’ set but not used [-Wunused-but-set-variable] int maxi, node, node2; ^ user.cpp: In function ‘int main()’: user.cpp:98:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("revolta.in", "r", stdin); ^ user.cpp:99:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("revolta.out", "w", stdout); ^