Compilare: main.cpp: In function 'int main()': main.cpp:57:12: warning: unused variable 'u' [-Wunused-variable] int n, k, u, ve, h = 0; ^ main.cpp:57:15: warning: unused variable 've' [-Wunused-variable] int n, k, u, ve, h = 0; ^~ main.cpp:55:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("arborest.in","r",stdin); ^ main.cpp:56:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("arborest.out","w",stdout); ^ main.cpp:58:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ main.cpp:61:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&tata[i]); ^