/in/foo.cc: In function 'void init()':
/in/foo.cc:20:59: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
    st_min[i][j] = min(st_min[i][j - 1],st_min[i + (1 << j - 1)][j - 1]),st_max[i][j] = max(st_max[i][j - 1],st_max[i + (1 << j - 1)][j - 1]);
                                                         ~~^~~
/in/foo.cc:20:128: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
    st_min[i][j] = min(st_min[i][j - 1],st_min[i + (1 << j - 1)][j - 1]),st_max[i][j] = max(st_max[i][j - 1],st_max[i + (1 << j - 1)][j - 1]);
                                                                                                                              ~~^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:48:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   mid = l + r >> 1;
         ~~^~~