#include <stdio.h>
#include <stdlib.h>

#define N_MAX 100000

int aib[N_MAX+1];
int aibSize;

void adauga(int val, int x ) {
  do {
    aib[x] += val;
    x += x & -x;
  } while ( x <= aibSize );
}

int suma(int x) {
  int s = 0;
  while (x) {
    s += aib[x];
    x &= x - 1;
  }
  return s;
}

int cauta (int val) {
  int x = 0;
  int interval = aibSize / 2;
  while (interval) {
    if ( aib[ x + interval] < val ) {
      val -= aib[x + interval];
      x += interval;
    }
    interval >>= 1;
  }
  return x+1;
}

int main()
{
  FILE *in  = fopen("aib.in","r");
  FILE *out = fopen("aib.out","w");

  int operatii;
  fscanf(in, "%d %d", &aibSize, &operatii);

  int i, val;
  for ( i = 1; i <= aibSize; i++ ) {
    fscanf(in, "%d", &val);
    adauga(val,i);
  }

  int alegere, a, b;
  for ( i = 1; i <= operatii; i++ ) {
    fscanf(in,"%d",&alegere);
    switch (alegere) {
      case 0:
        fscanf(in,"%d %d", &a, &b);
        adauga(b,a);
        break;
      case 1:
        fscanf(in,"%d %d",&a,&b);
        fprintf(out,"%d\n", suma(b) - suma(a-1));
        break;
      case 2:
        fscanf(in,"%d",&a);
        fprintf(out,"%d\n",cauta(a));
        break;
    }
  }

  fclose(in);
  fclose(out);

  return 0;
}