#include<stdio.h>
int n,m,x,y,z,i,j,s,t,c[100001],a[100001];
int main()
{
    freopen("aib.in","r",stdin),freopen("aib.out","w",stdout),scanf("%d%d",&n,&m);
    for(s=1;s<=n;s<<=1);
    for(i=1;i<=n;++i)
        scanf("%d",a+i),a[i]+=a[i-1],j=i-(i&(-i)),c[i]=a[i]-a[j];
    while(m--) {
        scanf("%d%d",&x,&y);
        if(x==2) {
            for(t=s,z=-1,i=0;t&&z==-1;t>>=1)
                if(i+t<=n)
                    if(c[i+t]<y)
                        i+=t,y-=c[i];
                    else if(c[i+t]==y)
                        z=i+t;
            printf("%d\n",z);
        } else {
            scanf("%d",&z);
            if(!x)
                for(;y<=n;c[y]+=z,y+=(y&(-y)));
            else {
                for(j=t=0;z;j+=c[z],z-=(z&(-z)));
                for(--y;y;t+=c[y],y-=(y&(-y)));
                printf("%d\n",j-t);
            }
        }
    }
    return 0;
}