<?php
$array = explode(" ", trim(fgets(STDIN)));
$N = $array[0];
$M = $array[1];
$candy = explode(" ", trim(fgets(STDIN)));
$ans = 0;
for($i = 0; $i < $N; $i++) {
  $c = $candy[$i];
  if($c > $M) {
    break;
  } else if($c == $M) {
    $ans++;
    break;
  } else {
    $M -= $c;
    $ans++;
  }
}
print($ans);
?>