/*
#include <stdio.h>
#include <stdlib.h>
int main()
{
printf("Hello world!\n");
return 0;
}
*/
/*
#include<stdio.h>
int main()
{
int n,i,a[300]={0},k[300]={0},temp=0;
scanf("%d",&n);
for(i=1;i<=n;i++)
{
a[i]=i/10;
k[i]=i%10;
}
for(i=1;i<=n;i++)
{
k[i]*=k[i+1];
if(k[i]>9)
{
a[i]+=k[i]/10;
temp=k[i]%10;
k[i]=0;
k[i]+=temp;
temp=0
}
}
return 0;
}
*/
/*
#include<stdio.h>
int main()
{
int n, m;
int arrN[100] = {0}, arrM[100] = {0};
int i, j, k;
scanf("%d",&n);
m = n-1;
k = 0;
for(;;)
{
arrN[k++] = n%10;
n/=10;
if(n==0)
{
break;
}
}
k = 0;
for(;;)
{
arrM[k++] = m%10;
m/=10;
if(m==0)
{
break;
}
}
return 0;
}
*/