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1503.cpp
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#include<iostream>
#include<cstring>
#include<string>
using namespace std;
class VERYLONGINT
{
public:
char st[128];
VERYLONGINT(){};
VERYLONGINT(const char *str)
{
int i;
for(i=0;i<128;i++)
st[i]='\0';
for(i=0;i<strlen(str);i++)
st[i]=str[i];
}
VERYLONGINT & operator += (const VERYLONGINT &N)
{
char ch1[128],ch2[128],ch3[128];
int i,j,m,n,s,t,l1=strlen(st),l2=strlen(N.st);
for(i=0;i<128;i++)
ch1[i]=ch2[i]=ch3[i]='0';
for(i=0;i<l1;i++)
ch1[i]=st[l1-1-i];
for(i=0;i<l2;i++)
ch2[i]=N.st[l2-1-i];
t=0;
for(i=0;i<=l1+l2;i++)
{
m=ch1[i]-'0';
n=ch2[i]-'0';
s=m+n+t;
t=s/10;
s%=10;
ch3[i]=s+'0';
}
t=0;
for(i=0;i<128;i++)
st[i]='\0';
j=0;
for(i=127;i>=0;i--)
{
if(ch3[i]!='0')t=1;
if(t)
{
st[j]=ch3[i];
j++;
}
}
if(!t)st[0]='0';
return *this;
}
};
int main()
{
VERYLONGINT n1="0";
char str[128];
while(cin>>str)
{
if(strlen(str)==1&&str[0]=='0')
{
cout<<n1.st;
return 0;
}
else
{
VERYLONGINT temp=str;
n1+=temp;
}
}
}