#include <iostream>
#include <cstdio>
using namespace std;
int main() {
int n, t, a[100005], ma=0, l=0, cnt=0;
scanf("%d%d", &n, &t);
for(int i=0; i<n; i++) {
scanf("%d", &a[i]);
while(t<a[i]) t+=a[l], l++, cnt--;
t-=a[i], cnt++;
if(cnt>ma) ma=cnt;
}
printf("%d", ma);
return 0;
}
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