Compilare: user.cpp: In function ‘int main()’: user.cpp:86:9: warning: unused variable ‘pula’ [-Wunused-variable] int pula = *T[i].begin(); ^ user.cpp:48:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &K); ^ user.cpp:50:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &root[0][i]); ^