最后一个点WA，求调

#include<bits/stdc++.h>
using namespace std;
#define ll long long
inline bool isdight(const char &c){return c>='0'&&c<='9';}
inline void read(ll &n){
	register short f=1;n=0;
	register char c=getchar_unlocked();
	while(!isdight(c)) f=-1,c=getchar_unlocked();
	while(isdight(c)) n=(n<<1)+(n<<3)+(c-'0'),c=getchar_unlocked();
	n*=f;return;
}
inline void write(ll n){
	if(!n) return;
	if(n<0) putchar_unlocked('-'),n=-n;
	write(n/10);
	putchar_unlocked(n%10+'0');
	return;
}
int main(){
	register ll n,ans=0,k;read(n);
	while(n--){read(k);ans+=k;}
	if(ans) write(ans);
	else putchar_unlocked('0');
	return 0;
}