#include <stdio.h>
int main(void)
{
int a, b, na[1000], nb[1000], i = 0, j = 0, x, y, num, count = 0;
scanf("%d%d", &a, &b);
while (a > 0)
{
na[i] = a % 10;
a /= 10;
i++;
}
while (b > 0)
{
nb[j] = b % 10;
b /= 10;
j++;
}
for (x = i - 1, y = j - 1; x >= 0 || y >= 0; x--, y--)
{
num = na[x] + nb[y];
if (num > 9)
{
count++;
}
}
if (count > 0)
{
printf("Yes");
}
else
{
printf("No");
}
return 0;
}
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