#include <cstdio>

int main() {
    int N, K;
    scanf("%d%d", &N, &K);
    int cnt = 0;
    int weight, total = 0;
    for(int n=0; n<N; n++) {
        scanf("%d", &weight);
        total += weight;
        if(total >= K) {
            cnt++;
            total = 0;
        }
    }
    if(total > 0) cnt++;
    printf("%d\n", cnt);
}