Compilare: main.cpp: In function 'int main()': main.cpp:405:48: 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:399:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("arboras.in", "r", stdin); ^ main.cpp:400:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("arboras.out", "w", stdout); ^ main.cpp:402:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:404:50: 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:405:49: 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:415:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &q); ^ main.cpp:417:24: 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; ^~