Compilare: user.cpp: In function ‘int main()’: user.cpp:90:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("home.in", "r", stdin); ^ user.cpp:91:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("home.out", "w", stdout); ^ user.cpp:94:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &k); ^ user.cpp:103:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x, &y); ^ user.cpp: In function ‘void dfs(const int&, int, int)’: user.cpp:84:28: warning: ‘amn2’ may be used uninitialized in this function [-Wmaybe-uninitialized] dfs(it, amn1, amn2); ^ user.cpp:84:28: warning: ‘amn1’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:79:37: warning: ‘id’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(dp[node][i].id != it && i != id){ ^