Compilare: user.cpp: In function ‘int get(int)’: user.cpp:24:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int it = 0; it < h[aux].size(); it++) ^ user.cpp: In function ‘void dfs(int, int)’: user.cpp:47:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int it = 0; it < g[x].size(); it++) ^ user.cpp: In function ‘int main()’: user.cpp:55:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbore3.in", "r", stdin); ^ user.cpp:56:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbore3.out", "w", stdout); ^ user.cpp:58:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &s); ^ user.cpp:62:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &t, &ar[i]); ^