#import<fstream>
int N,o,t,x,y,B['썐'],s,i,z;

int U(int p){for(;N/p;p+=p&-p)B[p]+=x;}

int Q(int p){for(z=0;p;p&=~-p)z+=B[p];return z;}

main(){std::ifstream f("aib.in");std::ofstream g("aib.out");

    for(f>>N>>o;N/++y;U(y))f>>x;

    for(;f>>t>>y;){

        for(s=o=1;N/s;s*=2);

        for(i=0;o*s;s/=2)i+s>N|y<(x=Q(i+s))||(i+=s,o=x!=y);

        t<2&&f>>x;

        t?g<<(t&1?Q(x)-Q(y-1):o?-1:i)<<'\n',0:U(y);}}