Problem:
Score : 200 points

Problem Statement

A ball will bounce along a number line, making N + 1 bounces. It will make the first bounce at coordinate D_1 = 0, and the i-th bounce (2 \leq i \leq N+1) at coordinate D_i = D_{i-1} + L_{i-1}.

How many times will the ball make a bounce where the coordinate is at most X?

Constraints

1 \leq N \leq 100

1 \leq L_i \leq 100

1 \leq X \leq 10000

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N X
L_1 L_2 ... L_{N-1} L_N

Output

Print the number of times the ball will make a bounce where the coordinate is at most X.

Sample Input 1

3 6
3 4 5

Sample Output 1

2

The ball will make a bounce at the coordinates 0, 3, 7 and 12, among which two are less than or equal to 6.

Sample Input 2

4 9
3 3 3 3

Sample Output 2

4

The ball will make a bounce at the coordinates 0, 3, 6, 9 and 12, among which four are less than or equal to 9.

Solution in Rust (1.15.1) (judge verdict: Accepted)

#![allow(unused_imports)]

macro_rules! input {
    ($($name:ident : $t:tt),*,) => {
        input!($($name: $t),*)
    };
    ($($name:ident : $t:tt),*) => {
        let mut _scanned = ::_input::Scanned::new(::std::io::stdin(), 1024);
        $(
            let $name = unsafe { _read_value!(_scanned, $t) };
        )*
    };
}

macro_rules! _read_value {
    ($scanned:expr, ($($t:tt),*)) => {
        ($(_read_value!($scanned, $t)),*)
    };
    ($scanned:expr, 1based) => {
        _read_value!($scanned, usize) - 1
    };
    ($scanned:expr, [u8]) => {
        _read_value!($scanned, String).into_bytes()
    };
    ($scanned:expr, [$t:tt; $n:expr]) => {
        (0..$n).map(|_| _read_value!($scanned, $t)).collect::<Vec<_>>()
    };
    ($scanned:expr, $t:ty) => {
        $scanned.next::<$t>()
    };
}

mod _input {
    use std::fmt;
    use std::io::{self, Read};
    use std::str::{self, FromStr};

    pub struct Scanned {
        buf: Vec<u8>,
        pos: usize,
    }

    impl Scanned {
        pub fn new<R: Read>(mut input: R, estimated: usize) -> Self {
            let mut buf_ = Vec::with_capacity(estimated);
            let _ = io::copy(&mut input, &mut buf_).unwrap();
            debug_assert!(str::from_utf8(&buf_).is_ok());
            debug_assert!(buf_.iter().all(|&c| u32::from(c) <= 0x7F));
            Scanned { buf: buf_, pos: 0 }
        }

        #[inline]
        pub unsafe fn next<T: FromStr>(&mut self) -> T
        where
            T::Err: fmt::Debug,
        {
            let mut start = None;
            loop {
                match (self.buf[self.pos], start.is_some()) {
                    (b' ', true) | (b'\n', true) => break,
                    (_, true) | (b' ', false) | (b'\n', false) => self.pos += 1,
                    (_, false) => start = Some(self.pos),
                }
            }
            let target = &self.buf[start.unwrap()..self.pos];
            str::from_utf8_unchecked(target).parse().unwrap()
        }
    }
}

use std::collections::{BTreeMap, BTreeSet, BinaryHeap, HashMap, HashSet, VecDeque};
use std::io::{self, BufWriter, Read, Stderr, StderrLock, Stdout, StdoutLock, Write};
use std::iter::{self, Product, Sum};
use std::num::{ParseFloatError, ParseIntError};
use std::ops::{
    Add, AddAssign, BitAnd, BitAndAssign, BitOr, BitOrAssign, BitXor, BitXorAssign, Deref,
    DerefMut, Div, DivAssign, Mul, MulAssign, Neg, Not, Rem, RemAssign, Sub, SubAssign,
};
use std::str::{self, FromStr};
use std::{char, cmp, f32, f64, fmt, i16, i32, i64, i8, mem, thread, u16, u32, u64, u8};

fn main() {
    input! {
        n: usize,
        x: u32,
        ls: [u32; n],
    }
    let mut r = 1;
    let mut d = 0;
    for l in ls {
        d += l;
        if d <= x {
            r += 1;
        }
    }
    println!("{}", r);
}