1 /*大数相加*/
 2 #include<stdio.h>
 3 #include<string.h>
 4 #define M 10000
 5 char s1[M], s2[M];
 6 int c1[M], c2[M];
 7 int main()
 8 {
 9      int i, j, m, n, t, k;
10      while(scanf("%s%s",s1,s2) != EOF)
11      {
12             getchar();
13             int c3[M]={0};
14             m=strlen(s1);
15             n=strlen(s2);
16             for(i=0; i<m; i++)
17             c1[i]=s1[i]-48;
18             for(j=0; j<n; j++)
19             c2[j]=s2[j]-48;
20             if(m>n)
21             t=m;
22             else
23             t=n;
24             for(i=m-1, j=n-1 ,k=0; k<=t ;k++, i--, j--)
25             {
26                 if(i>=0 && j>=0)
27                     c3[k] += c1[i] + c2[j];
28                 else if(i>=0 &&  j<0)
29                     c3[k] += c1[i];
30                 else if(i<0 && j>=0)
31                     c3[k] += c2[j];
32                 else break;
33                 if(c3[k]>=10)
34                     {
35                         c3[k+1] += 1;
36                         c3[k] -= 10;
37                     }
38             }
39             for(i=0; i<t; i++)
40             printf("%d",c3[i]);
41             if(c3[t]==0)
42             printf("\n");
43             else 
44             printf("%d\n",c3[t]);
45     }
46     return 0;
47 }