Compilare: user.cpp: In function ‘int main()’: user.cpp:93:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0;i < strlen(A);i++) ^ user.cpp:97:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0;i < strlen(B);i++) ^ user.cpp:79:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("logic.in","r",stdin); ^ user.cpp:80:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("logic.out","w",stdout); ^ user.cpp:82:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&N); ^ user.cpp:86:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",A); ^ user.cpp:87:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",B); ^