646 B | 646 chars
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
BLANK = " "
inp = input
# inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
n, q = mii()
lengths = [ii() for _ in range(n)]
queries = [ii() for _ in range(q)]
song = []
for i in range(n):
song.extend([i + 1] * lengths[i])
for i in queries:
p(song[i])
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
if t != 1:
input()
ret = solve()