Compilare: user.cpp: In function ‘int main()’: user.cpp:28:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= strlen(A + 1); ++i ) ^ user.cpp:22:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsecvente2.in","r",stdin); ^ user.cpp:23:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsecvente2.out","w",stdout); ^ user.cpp:24:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i",&N); ^ user.cpp:25:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",A+1); ^ user.cpp:47:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",A+1); ^ user.cpp:39:9: warning: ‘Sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] int Sol; ^