Compilare: main.cpp: In function 'int main()': main.cpp:394:48: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=] for (int i = 1; i < n ; ++i) scanf("%d", &l[i]); ^ main.cpp:391:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:393:50: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] for (int i = 1; i < n ; ++i) scanf("%d", &tt[i]); ^ main.cpp:394:49: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] for (int i = 1; i < n ; ++i) scanf("%d", &l[i]); ^ main.cpp:404:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &q); ^ main.cpp:406:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^ main.cpp: In function 'void dfs(int)': main.cpp:41:3: warning: 'mx' may be used uninitialized in this function [-Wmaybe-uninitialized] if (sz[it.x] > mx) mx = sz[it.x], heavy[nod] = it.x; ^~