/in/foo.cc: In function 'int main()':
/in/foo.cc:138:45: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
      printf("%I64d %lld\n", sum[sb], sum[sa]);
                                             ^
/in/foo.cc:104:25: warning: variable 'ans1' set but not used [-Wunused-but-set-variable]
  register long long a,b,ans1,ans2,lenth,sa,sb,c,ok,M = 0;
                         ^~~~