/in/foo.cc: In function 'void init()':
/in/foo.cc:15:68: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
             st_min[i][j] = min(st_min[i][j - 1],st_min[i + (1 << j - 1)][j - 1]),
                                                                  ~~^~~
/in/foo.cc:16:68: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
             st_max[i][j] = max(st_max[i][j - 1],st_max[i + (1 << j - 1)][j - 1]);
                                                                  ~~^~~