Compilare: user.cpp: In function ‘int main()’: user.cpp:38:16: warning: suggest parentheses around assignment used as truth value [-Wparentheses] vis[i] = cost[i] = cnt[i] = 0; ^ user.cpp:60:57: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(used[*it[node]] == graph[*it[node]].size() - 1) ^ user.cpp:28:35: warning: unused variable ‘dad’ [-Wunused-variable] int n, k, i, ans, x, y, node, dad; ^ user.cpp:26:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cezar.in", "r", stdin); ^ user.cpp:27:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cezar.out", "w", stdout); ^ user.cpp:30:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ user.cpp:32:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^