120%AC

#include<cstdio>
#define ll long long
ll sum(ll n){
    ll m=0;
    for(;n;n/=10){
        m+=n%10;
    }
    return m;
}
int main(){
    ll n,a,max=-9.223372036854808e+015;
    scanf("%lld\n",&n);
    for(ll i;i<n;i++){
        scanf("%lld\n",&a);
        if(sum(a)>max)max=sum(a);
    }
    printf("%lld",max);
}