测试点#9 RE, 不知道怎么回事，有没有大犇可以帮我看看

#include <bits/stdc++.h>

using namespace std;

const int N = 4e6 + 5;

int n, m, as, ai, aj;  // ans_sum, ans_i, ans_j

int a[N];

int main() {
    cin >> n >> m;
    for (int i = 1; i <= n; i++) cin >> a[i];
    int *i = a + 1, *j = a + 1; int sum = *i;
    while (i - a <= n) {
        while (sum <= m) j++, sum += *j; sum -= *j, j--;
        if (sum > as) as = sum, ai = i - a, aj = j - a;
        sum -= *i; i++;
    }
    cout << ai << ' ' << aj << ' ' << as << endl;
    return 0;
}