/in/foo.cc: In function 'int main()':
/in/foo.cc:18:69: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   18 |                         st[i][j] = max(st[i][j - 1], st[i + (1 << j - 1)][j - 1]);
      |                                                                   ~~^~~