/in/foo.cc: In function 'int main()':
/in/foo.cc:10:27: error: 's' was not declared in this scope
   10 |                 cin>>a[i],s[i]=s[i-1]^a[i];
      |                           ^
/in/foo.cc:12:16: error: 'g' was not declared in this scope
   12 |         memset(g,0xcf,sizeof g);
      |                ^
/in/foo.cc:16:39: error: 's' was not declared in this scope
   16 |                 dp[i]=max(dp[i-1],g[k^s[i]]+1);
      |                                       ^