Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:19:15: warning: unused variable ‘k’ [-Wunused-variable] int n, i, k, nodCopil,subArbore; ^ user.cpp: In function ‘int main()’: user.cpp:45:18: warning: unused variable ‘j’ [-Wunused-variable] int n, m, i, j, s, t, x, y; ^ user.cpp:45:21: warning: unused variable ‘s’ [-Wunused-variable] int n, m, i, j, s, t, x, y; ^ user.cpp:45:24: warning: unused variable ‘t’ [-Wunused-variable] int n, m, i, j, s, t, x, y; ^ user.cpp:42:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("asmax.in","r",stdin); ^ user.cpp:43:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("asmax.out","w",stdout); ^ user.cpp:47:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:48:55: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for( i = 1; i <= n; ++i ) scanf("%d",&nodVal[ i ]); ^ user.cpp:53:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^