Compilare: user.cpp: In function ‘int main()’: user.cpp:10:10: warning: unused variable ‘c’ [-Wunused-variable] char c, s[5000]; ^ user.cpp:6:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("harddp.in", "r", stdin); ^ user.cpp:7:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("harddp.out", "w", stdout); ^