Compilare: user.cpp: In function ‘void dfsIni(int)’: user.cpp:30:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<list[node].size();i++){ ^ user.cpp: In function ‘long long int getMagic()’: user.cpp:62:15: warning: unused variable ‘ans’ [-Wunused-variable] long long ans = (1LL<<60); ^ user.cpp: In function ‘void dfs(int)’: user.cpp:89:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<list[node].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:99:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("spiridusi.in","r",stdin); ^ user.cpp:100:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("spiridusi.out","w",stdout); ^ user.cpp:102:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&c); ^ user.cpp:103:40: 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",&s[i]); ^ user.cpp:104:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=n;i++) scanf("%lld",&p[i]); ^ user.cpp:106:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&x,&y); ^