Compilare: user.cpp: In function ‘bool cauta(unsigned int)’: user.cpp:14:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<h[x%MOD].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:34:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<l;++i) ^ user.cpp:41:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<l;++i){ ^ user.cpp:49:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = l; i < len ; ++ i){ ^ user.cpp:24:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("abc2.in" , "r" , stdin); ^ user.cpp:25:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("abc2.out", "w" , stdout); ^ user.cpp:27:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", text); ^ user.cpp:31:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", cuvant); ^ user.cpp:49:18: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] for( int i = l; i < len ; ++ i){ ^