/in/foo.cc: In function 'long long int dp(long long int, int)':
/in/foo.cc:24:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for (len=12;x<p10[len];len--);  len++;//printf("len=%d\n",len);
  ^~~
/in/foo.cc:24:34: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  for (len=12;x<p10[len];len--);  len++;//printf("len=%d\n",len);
                                  ^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:43:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j,k;
        ^
/in/foo.cc:43:10: warning: unused variable 'k' [-Wunused-variable]
  int i,j,k;
          ^