Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:20:33: warning: unused variable ‘k’ [-Wunused-variable] int l = ls[x].size(), y, i, k = -1; ^ user.cpp:21:10: warning: unused variable ‘frunza’ [-Wunused-variable] bool frunza = 1; ^ user.cpp: In function ‘void dfs2(int, int)’: user.cpp:33:33: warning: unused variable ‘k’ [-Wunused-variable] int l = ls[x].size(), y, i, k = -1; ^ user.cpp: In function ‘int main()’: user.cpp:94:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("confuzie.in", "r", stdin); ^ user.cpp:95:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("confuzie.out", "w", stdout); ^ user.cpp:96:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &n, &m); ^ user.cpp:98:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &x, &y); ^ user.cpp:116:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d ", &t, &x); ^ user.cpp:118:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &y); ^