Compilare: user.cpp: In function ‘void Adauga(Trie*, int, int)’: user.cpp:27:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i == strlen(a))return; ^ user.cpp: In function ‘bool Ok(int)’: user.cpp:43:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz[k[1]].size() < L) return false; ^ user.cpp:46:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz[k[i]].size() < L|| poz[k[i]][L-1] != poz[k[i-1]][L-1]) return false; ^ user.cpp: In function ‘int main()’: user.cpp:52:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ratina.in","r",stdin); ^ user.cpp:53:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ratina.out","w",stdout); ^ user.cpp:54:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&N,&M); ^ user.cpp:59:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",a); ^ user.cpp:63:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ",&nr); ^ user.cpp:65:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ",&k[i]); ^