#include <bits/stdc++.h>
using namespace std;

#include <cassert>

#define lf "\n"
#define ff endl
#define fi first
#define se second
#define _ << " " <<
#define all(x) begin(x),end(x)
#define rall(x) rbegin(x),rend(x)

#ifdef DEBUG

constexpr bool IS_DEBUG = true;

#define infor(fmt, ...) do { print(stderr, fmt, ##__VA_ARGS__); } while(0)
#define infof(fmt, ...) do { println(stderr, fmt, ##__VA_ARGS__); } while(0)

#else

constexpr bool IS_DEBUG = false;

#define infor(fmt, ...)
#define infof(fmt, ...)

#endif /* DEBUG */

using ll = long long;

using pll = pair<ll, ll>;
using pii = pair<int, int>;

template<typename... Args>
using vec = vector<Args...>;

mt19937 timmy_loves_gambling(73);

int quadri(int N, long long M, int *V) {
    auto check = [&](int m) -> bool {
        ll mx = 0, s = 0;
        mx = s = accumulate(V, V + m, 0LL);

        for(int i = m; i < N; ++i) {
            s -= V[0];
            s += V[i];
            mx = max(mx, s);
        }

        return mx <= M;
    };

    int l = 0, r = N + 1;
    while(r - l > 1) {
        int m = (l + r) / 2;

        if(check(m)) {
            l = m;
        } else {
            r = m;
        }
    }

    return l;
}

#ifdef LOCAL

static FILE *fr, *fw;

// Declaring variables
static int N;
static long long M;
static int* V;
static int B;

// Declaring functions
int quadri(int N, long long M, int* V);

int main() {
	fr = stdin;
	fw = stdout;

	// Iterators used in for loops
	int i0;

	// Reading input
	fscanf(fr, "%d %lld", &N, &M);
	V = (int*)malloc(N * sizeof(int));
	for (i0 = 0; i0 < N; i0++) {
	    fscanf(fr, "%d", &V[i0]);
	}

	// Calling functions
	B = quadri(N, M, V);

	// Writing output
	fprintf(fw, "%d\n", B);

	fclose(fr);
	fclose(fw);
	return 0;
}

#endif /* LOCAL */