<?php
// Your code here!
$l = trim(fgets(STDIN));
$n = trim(fgets(STDIN));
$box_w = explode(" ", trim(fgets(STDIN)));
$sum = 0;
$i = 0;
foreach ($box_w as $key => $value){
    $sum = $value + $sum;
    if($sum <= $l){
        $i++;
    } else if($sum >= $l){
            print $i;
            break;
    }
}
?>