Compilare: user.cpp: In function ‘int main()’: user.cpp:105:15: warning: variable ‘it’ set but not used [-Wunused-but-set-variable] for (auto it : s1) { ^ user.cpp:108:15: warning: variable ‘it’ set but not used [-Wunused-but-set-variable] for (auto it : s2) { ^ user.cpp:37:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("secvente2.in", "r", stdin); ^ user.cpp:38:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("secvente2.out", "w", stdout); ^ user.cpp:43:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &N); ^ user.cpp:53:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &a); ^