ural 1104 Don’t Ask Woman about Her Age

http://acm.timus.ru/problem.aspx?space=1&num=1104

 #include <cstdio>
 #include <cstring>
 #include <algorithm>
 #define maxn 2000000
 using namespace std;

 char s1[maxn];

 int main()
 {
     scanf("%s",s1);
     int k=strlen(s1);
     char ch='+';
     int sum=;
     for(int i=; i<k; i++)
     {
         if(s1[i]>ch) ch=s1[i];
         if(s1[i]>=''&&s1[i]<='') sum+=(s1[i]-'');
         else if(s1[i]>='A'&&s1[i]<'Z') sum+=(s1[i]-'A'+);
     }
     int c;
     if(ch>=''&&ch<='') c=ch-'';
     else c=ch-'A'+;
     if(c+<) c=;
     else c++;
     for(; c<=; c++)
     {
         if(sum%(c-)==) break;
     }
     if(c<=) printf("%d\n",c);
     else if(c>) printf("No solution.\n");
     return ;
 }