Compilare: user.cpp:3:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main(){freopen("clasament.in","r",stdin);freopen("clasament.out","w",stdout);int n,t;long long ans=1;scanf("%d%d",&n,&f[0]);while(n--){scanf("%d",&t);++f[t];ans=ans*f[t-1]%666013;--f[t-1];}printf("%lld",ans);} ^ user.cpp: In function ‘int main()’: user.cpp:3:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] main(){freopen("clasament.in","r",stdin);freopen("clasament.out","w",stdout);int n,t;long long ans=1;scanf("%d%d",&n,&f[0]);while(n--){scanf("%d",&t);++f[t];ans=ans*f[t-1]%666013;--f[t-1];}printf("%lld",ans);} ^ user.cpp:3:77: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] main(){freopen("clasament.in","r",stdin);freopen("clasament.out","w",stdout);int n,t;long long ans=1;scanf("%d%d",&n,&f[0]);while(n--){scanf("%d",&t);++f[t];ans=ans*f[t-1]%666013;--f[t-1];}printf("%lld",ans);} ^ user.cpp:3:124: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] main(){freopen("clasament.in","r",stdin);freopen("clasament.out","w",stdout);int n,t;long long ans=1;scanf("%d%d",&n,&f[0]);while(n--){scanf("%d",&t);++f[t];ans=ans*f[t-1]%666013;--f[t-1];}printf("%lld",ans);} ^ user.cpp:3:150: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] main(){freopen("clasament.in","r",stdin);freopen("clasament.out","w",stdout);int n,t;long long ans=1;scanf("%d%d",&n,&f[0]);while(n--){scanf("%d",&t);++f[t];ans=ans*f[t-1]%666013;--f[t-1];}printf("%lld",ans);} ^