Compilare: user.cpp: In function ‘void Adauga(Trie*, int)’: user.cpp:27:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < strlen(a); ++i) ^ user.cpp: In function ‘bool Ok(int)’: user.cpp:42:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz[k[1]].size() < L) return false; ^ user.cpp:45:31: 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:50:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,st,dr,mij,sol; ^ user.cpp:51:35: 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:52:37: 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:53:27: 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:58:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",a); ^ user.cpp:62:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ",&nr); ^ user.cpp:64:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ",&k[i]); ^