/in/foo.cc: In function 'int main()':
/in/foo.cc:23:44: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
    maxn[i][j]=max(maxn[i][j-1],maxn[i+(1<<j-1)][j-1]), minn[i][j]=min(minn[i][j-1],minn[i+(1<<j-1)][j-1]);
                                           ~^~
/in/foo.cc:23:96: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
    maxn[i][j]=max(maxn[i][j-1],maxn[i+(1<<j-1)][j-1]), minn[i][j]=min(minn[i][j-1],minn[i+(1<<j-1)][j-1]);
                                                                                               ~^~