OJ-Problems-Source/HDOJ/1489_autoAC.cpp
2016-08-14 09:16:58 +08:00

42 lines
727 B
C++

#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<algorithm>
#include<queue>
#include<time.h>
using namespace std;
long long s[100005];
int main()
{
long long n,i,ans;
while(cin>>n)
{
if(n==0)
{
break;
}
for(i=0;i<n;i++)
{
cin>>s[i];
}
ans=0;
for(i=0;i<n-1;i++)
{
if(s[i]>0)
{
ans+=s[i];
s[i+1]+=s[i];
}
else
{
ans-=s[i];
s[i+1]+=s[i];
}
}
cout<<ans<<endl;
}
return 0;
}