Compilare: user.cpp: In function ‘void updateAIB(int, int, int)’: user.cpp:20:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (ind < aib[node].size()) ^ user.cpp: In function ‘void interclasare(int)’: user.cpp:32:66: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < arb[leftSon].size() + arb[rightSon].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:136:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mess.in","r",stdin); ^ user.cpp:137:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mess.out","w",stdout); ^ user.cpp:139:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:144:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i]); ^ user.cpp:157:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int op; scanf("%d", &op); ^ user.cpp:160:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int pos; scanf("%d", &pos); stare[pos] *= (-1); ^ user.cpp:166:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &L , &R, &K); ^