Compilare: user.cpp: In function ‘int main()’: user.cpp:29:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= strlen(A + 1); ++i ) ^ user.cpp:50:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 1; i <= strlen(A+1); ++i ) ^ user.cpp:23:41: 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:24:43: 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:25:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i",&N); ^ user.cpp:26:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",A+1); ^ user.cpp:48:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",A+1); ^ user.cpp:69:21: warning: ‘Sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%i",Sol+1); ^