#include <stdio.h>

int main(void) {
    int boxSize, number = 0, block[10000], maxNumber, width, i;

    scanf("%d", &boxSize);
    scanf("%d", &number);
    for(i=0;i<number;i++)
        scanf("%d", &block[i]);

    maxNumber = width = 0;

    for(i=0; i < number; i++) {
        width += block[i];
        if (width <= boxSize)
            maxNumber++;
        else
            break;
    }

    printf("%d\n", maxNumber);

    return 0;
}