#include <iostream>
using namespace std;
int flag;
long long int input()
{
long long int num=0,minusflag=0;
char c=getchar();
if(c=='-')
{
//checking if the input number is negative
c=getchar();
minusflag=1;
}
while(c!=' ')
{
if(c=='\n')
{
flag=0;
if(minusflag==1)
num=-num;
return num;
}
num=num*10+(c-'0');
c=getchar();
}
if(minusflag==1)
num=-num;
return num;
}
int main() {
// your code goes here
long long int sum=0,a;
flag=1;
while(1)
{
a=input();
sum=sum+a;
if(flag==0)
break;
}
cout<<sum;
return 0;
}
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