/in/foo.cc: In function 'int main()':
/in/foo.cc:27:44: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
    f[j][i] = max(f[j][i - 1],f[j + (1 << i - 1)][i - 1]); 
                                          ~~^~~
/in/foo.cc:28:44: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
    s[j][i] = min(s[j][i - 1],s[j + (1 << i - 1)][i - 1]);
                                          ~~^~~